loved its artstyle of having real/lifelike environments and having olimar/ pikmin/ monsters semi-cartoony. It's style is very unique and I like the way it is. :)

Got to be realistic (the same style as the first two). It really helped the immersion factor to have these strange, alien Pikmin creatures in very realistic, very convincing, very recognizable earth environments. In fact the graphics of the first two Pikmin games are among the best of the last generation in my opinion.

Pikmin epic yarn graphical styling would be really cool.

That doesn't really work in 3D... 

@Topic

I think they should stay with the same style, it was perfect for the game.

I also wonder what new Pikmin will be added to the current types of Pikmin?

a couple years ago, i would have said that 5 different types of pikmin is enough, and more would just over complicate things, but little kings story showed me that 15 different kinds of units doesn't do that if you have a good way to manage them.

as for types, getting to keep those little bulbmin would be nice.

I think a realistic-looking Pikmin would be great.

Same as GC.   Cell shaded and fully realistic wouldn't work very well.