Chibis, and any variation of chibi imaginable. For those of you not in the know, 'Chibi' is Japanese for short person. What it is in eastern society is a super deformed character used for parodies of their comics, or to give a light hearted atmosphere with the illusion of it being a child. This application is fine, and where it should stay.
Chibi is an abused art form however cause it's cute, easily liked, and you don't need to learn proportion to draw in the style cause it's already so super deformed that it ignores most rules anyways. Because of this, alot of beginner artists draw in the style, and they think that as long as it's cute, it's ok if it's wrong. That, and it's ALL you see at conventions I go to now cause it's fast to draw, and if your colouring is great, then you can get HEAPS of cheap attention from squees. I use to like it, but you know what? I'm now actually sick to death of chibis. What the heck happened to properly finished art? You don't see it anymore! The worst thing is that if artists do it too much, their 'normal' art becomes super deformed too. They can't draw adults. It REALLY destroys art styles. I've seen it happen. Chibi artists that can't draw non chibi art anymore.
SO many people love the style, but I hate it cause it destroys actual art. It's cheap, and tacky, and I'm over it. Hate me for it if you like, but that's how it is for me.
Sorry if I sound so serious >.<