Depends. At first, I like the challenge, so won't over-power myself. But then I want to see how broken I can make my character/party, and then, watchout. My most overpowered to this day remains my monk from Baldur's Gate 2. Huge stat bonuses, better armoured than most dragons (no actual armor needed), insane damage output, both by having more attacks/round than any other character and doing more damage/hit than even the dedicated warriors (no weapon needed), the saves needed to ignore pretty much any negative effect, being 100% immune to magic, stunning attacks, an instant-kill attack, huge hit-point total with regeneration, and, just to give him a bit of ranged ability, fireballs from the unique "Book of Infintite Spell." My friends didn't believe me when I told them about him, until I showed them him fighting a dragon 1-on-1 and coming out without a scratch.