Gen 1: Scyther Gen 2: Umbreon (excluding Suicune and Typhlosion) Gen 3: Flygon Gen 4: Buoysel (or is it Buizel? I forget which is JAP and which is ENG and they're pronounced the same anyway), barely beating Lucario Gen 5: Excadrill (excluding Serperior) Gen 6: Fennekin
Not the most original list, but can't forcefully change something I like. I'm guessing Buoysel is the only unpopular choice on my list. :P
Out of the new starters, I prefer Fennekin right now, but I'll probably be choosing the starter based on their final evolutions, rather than the first forms, so I can't say if I'll really go with Fennekin.