I am super-mega-fucking-excited about this. Don't be fooled by my avatar, I love the new gens better than the oldies (fave Pkmn is Roserade).
RE: grafix
I fail to see the problem, quite frankly. No, they are nothing to write home about, but come on, they're just getting started. It's a work in progress; it's not supposed to be amazing fresh off the boat. Future Pkmn games will improve their 3D graphics, I'm sure. It can't be worse than the old graphics of RBY and GSC or even RSE, which I can't handle anymore because I'm too used to the DS graphics by now, lol.
Anyways, my thoughts on the Pogeys...
Chespin: Will be choosing him fo' sho'! Grass types for the win; see avatar. He's adorkable and I hope his final evo is Grass/Dark.
Fennekin: I don't care about foxes, and even if this one ends up being Fire/Psychic (well, his final evo), I'm not here for that. Emboar is the only fire starter that I worship (no, IDC about Blaziken/Infernape, don't choke on your drink).
Froakie: If it ends up having a badass evolution and a cool Water-Fighting typing I might go with it instead of Chespin, but it'd have to be the case that Chespin's final evo is really disappointing. We'll see, I guess. It's nice to finally have a frog that will, in all likelihood, have good stats, unlike the balanced (and mediocre) stats of Politoed, Poliwrath and Seismitoad (IDC about Toxicroak).
Xerneas: Cool, but I don't think it's part Grass, and will probably not use it. I think I like Yveltal better.
Yveltal: 'Tis fucking badass, and I love the letter Y as well as the phonetic sound /y/. I think I'm definitely getting Pokemon Y, hmm!