I actually really like the new (actually, not so new anymore) Sinnoh Gym Leaders like Candice and Maylene, but I think my favorites will always be in Johto. Clair is grumpy, but somewhat loveable.
My least favorite Gym Leaders are in two categories: Personality and Battling. I hate Pryce in the Battling category, and most definetly Whitney in the Personality category. I mean, who wants a bitchy Gym Leader?? I will admit I was pissed off when she wouldn't give me my badge at first. Then again, Clair did the exact same thing... :)
But what do you guys think?