I think I am addicted to starting new games, but really I just want to get that perfect class for completing the game for the first time.
There is no such thing as the perfect class.
Perfect is what you want it to be.
Sit down for 5minutes prior to starting and outline a few key elements of what you would like, Give yourself some rules (what you will and wont use) and throw in a small gimp into the mix. For instance, my current character doesn't use shields, instead I use destruction magic in that hand. It gives the game a different feel and requires a different approach.
Give yourself an obstacle to overcome, and when you do. Its very very rewarding.