Lenora, hands down. First, I love that she's a normal user. not many players or gym leaders go with that type. The AI played like a champ versus my team. I retired twice before accepting my placement. I won in the end, but I'd lost 4 guys each time through. Can you really say you won when the leader takes on a team of 6 with just 2? That's just impressive.
Especially considering how the game holds your hand through the first gym, with just giving you a free poke to trump your starter's weaknesses. Seriously, not even a haphazard trade for a low-level patrat or something? geez. Of course, I do like how in doing that, the game makes players focus more on all the types, rather than leveling up 2-3 ubers through story mode.
I'm not the kind of guy that sits outside town spending 5 hours power leveling my starter, and I despise using things like dire hit or X defend so early in the game, (though i love that my lilipup is picking up full heals every 5 minutes). No, I'm the kind of guy who is kleptomaniacal enough to grab every friggin poke i come across, level them up to current par, and get them all ready for my hardcore breeding sessions.