first one: my fav, the idea is funny and it has a whole bunch of weird chars (mexicans included). I liked combination of backgrounds, it felt new.
second one: uhm... I liked the set up and scenary. I think I didn't got the joke because I didn't completely understand what they say (my fault, english is not my primary language). The animation was a bit uninteresting
third one: I lurve your hands/face expressions, they are great. The flashback idea was great, I didn't like the alien part per se (I think it was the alien animation I didn't like) but the rest looks really pro man, congrats on that. The whole music and voices were wonderful, specially the music!