Pissing in a mailbox is a misdemeanor, not a felony.
Art: The art is in this awkward place between cartoon/realistic and straight cartoon. As a result the more realistic facial expressions look great, but the more exaggerated cartoonish expressions look awfully strange. If you're going to go for those expressions you really need to just take the leap and go full out cartoon when you do. Because of the way you've been doing things so far, there's not a lot in the way of consistency of facial structure. Especially in head size, shape, and the ridge placement.
Take
this for example. Second to last panel, the bearded dude has a normal sized forehead. In the last panel he has no forehead. Now compare the Viking guy's face shape, (narrow with a pronounced chin) to
this comic. It's squared off with more emphasis on the forehead. I have no problem with evolving style. I love to see it. But you're not really evolving in any one direction. You're kinda all over the place. Another example is in your bodies. They can either be rubbery, or realistic. They can't be both. If you give someone realistic musculature and then have their arm bend in a curve, that just looks weird.
Also, how many fingers are on your characters hands? Four or five? This is a decision you should've made a long time ago. You can't just go back and forth whenever it suits you.
Backgrounds are simple but they suit the comic I think. I hate the photo-backgrounds, definitely stick to drawn in ones.
Writing: Choking Dolphins is an appropriate title for this comic, because it feels like one big circle jerk. I assume this is supposed to be a humor comic even though there are no jokes, only non-sequitors and wacky events. In the beginning it was pretty painful. Characters would just go off on some tangent that didn't relate to anything. Like :
"I don't know if this is a batman costume or a zorro costume."
"Speaking of Batman, Frank Miller thinks all women are whores."
Firstly, he wasn't speaking about batman, he was speaking about his costume. Secondly the response begins "speaking of batman" but then says something totally unrelated to batman. Sure Frank Miller once made a batman comic, but it a pretty tenuous connection. See now if he'd say "speaking of whores" or "speaking of frank miller" or maybe even "speaking of Sin City" it could've worked but as it stands it's apples and oranges. Or how about:
"I just realized I've never been to a party before."
Really? He just realized this? Like it dawned on him all of a sudden? He never noticed it before now? Seriously thanks for the awkward exposition, but if I were about to have some lobster, and I'd never eaten lobster before I'd say "You know, guys, I've never eaten lobster before." Not "I just realized I've never eaten lobster before." Hey! I just realized I never reviewed your comic before! Oh wait, no I didn't. I knew it all along. Nobody speaks like this. I promise you don't even speak like this with your friends. At best you're taking snippets of conversations with your friends and cobbling them together even though they don't go together and trying to insert them into a storyline where they don't belong. It's like you're building a house, and you have mortar, and you have bricks, but all the bricks are all different sizes and shapes and colors, you got some round bricks, and a trapezoid one, and one that's fifteen feet long, but only half an inch wide, and you're trying to build a house with these bricks but no matter how much mortar you use the house is going to kinda suck because none of the bricks fit together... In retrospect I'm sure I could've thought of a much simpler metaphor than that... Oh! It's like you have a bunch of jigsaw puzzle pieces and none of them fit together but you have a hammer, and by god you'll make 'em fit. So in the end your puzzle looks like a disjointed mess of unrelated puzzle pieces. There you go. That's a solid metaphor for your dialogue. Another big issue here is that all your characters sound the same. Would there be any difference, any difference at all if you switched around the text bubbles? You need to distinguish differences in there peoples personalities. The problem is not that I can't tell any of them apart, it's that they're totally interchangeable.
Now lately you've had the non-sequitor remarks cut down a bunch, but instead you've had an ongoing non-sequitor storyline. Its like everything that happens is deus ex machina. They go to a party, then they get arrested, then track down a pimp, then their part of a conspiracy, then they travel through time and space, and one of them becomes a Viking and then a werewolf too, and one of them travels all over time for shits and giggles, and one of them is worshiped and then does some drugs, and then theres a robot too... Theres no real driving force for this storyline, it's just a bunch of things happening that you think would be cool if they happened to you, and then when you run out of ideas for that thing you have another random thing happen. Non-sequitors can only really work if they have something constant to bounce off of. Even something like ATHF or Sealab has a driving force. The characters are trying to do something, get their EZ-bake oven, stop a robot bunny, you know, something. They have a goal to accomplish, something to prevent, or something to achieve, and all the craziness that happens is around trying to achieve this goal. Your characters don't have anything like this. They're just there, and stuff happens, and they don't really care, so neither does the reader. This is fine for you recording your fanboy fantasies but for a third party reading it as fiction, it doesn't have any substance. You need to start planning your story in advance so its always moving in one direction.
Final Word: I see a lot of problems in this comic that I've really struggled keeping out of my own comic. The thing is, if you know this character it might be funny that they do that wacky thing, so it's funny to you because you know them. But you haven't conveyed anything real about this character to the reader, so I don't know anything about them, so I don't care when they do that wacky thing. All I see is character x does/says wacky thing. I want to say that EVERY problem I've pointed out in this review is one I've notice in my own work and have taken great pains to try to eliminate. You really need to put yourself in the place of the reader and ask "why should I care" and if there isn't a reason there, you really need to work on making one. Writing is a skill, just like drawing and if you want it to be good it takes at least as much work as drawing.