Now that the second evos may be revealed sooner than some of us think, how about naming our subjective top 3 favorite and top 3 least favorite starters from the 6 existing generations?
I'll start. Keep in mind I don't hate any of them, in fact I like them all at least a bit.

Least favorite:
3) Feraligatr.
I don't know. I feel like I should like it more, as I adore other "monstrous" mons like Tyranitar and Aggron, but I somehow don't. Mainly because after choosing Cyndaquil a lot I was quite disappointed with Totodile, as even my Pidgey was doing a better job, but that was when I was like 9 and sucked at games.
Also its sprites looked weird for me back then (yes, the "it looks like a butt" meme, plus, I don't know, mecha-like?).
In overall, nothing really wrong with Feraligatr, I just need another playthrough to like it again.
2) Chesnaught
Pretty neutral, also the only starter I've never picked (yet). I remember being disappointed with it, especially that Chespin looked the best for me from the first stages. Definitely could be worse, though.
Also its 3D model hurts a bit.
1) Serperior
Again, I don't hate any starter, so I don't hate Serperior either. I just think it feels like the most... vanilla one. I can't find anything offensive about it... other than the fact it looses legs, maybe?
I know there's this entire "smug" look everyone talks about all the time, but I can't really feel it. Imho it lacks character compared to the other starters.

Character limit, continuation in the next post.