I sure hope this hasn't been suggested yet...

I think the experience points awarded for doing ANYTHING should be divided by a factor representative of the total number of times the anything has been performed in the past. In other words, someone that has killed 2,000,981 gladiators would not receive as much experience as someone who has just killed a gladiator for the first time.
The reason? Because the person who has just killed his 2,000,981st gladiator hasn't learned anything; they haven't gained any experience.
I know this puts a wrench in the whole "progression point" methodology and "experienced" players would never gain PP for doing something that is routine to them. But then again, I think this idea solves a lot of the "complaints" people have of power levelers.
Araye
get ready to flame in 3, 2, 1.....