With Ross and Rachel the attraction (at least from Ross) was there from episode 1 and here - at least, I hope it's the case - it will slowly develop as they go, I think nick and jess could actually work.
I like Nick's harsh, sarcastic sense of humor but Schmidt is getting awesomely HILARIOUS too. especially in the last couple of episodes when he shows his feelings for Cece. I didn't quite care for him in the beginning where his character was just sushi-eating (ki)mono-wearing douche, but there is another side to him - and he's starting to really grow on me.
I can't decide which one is my fav, mostly because what I love about this show is the chemistry between all three guys - each of them bring something fun to the table.