Hmmm...I have a few of these.
In games with guns, I use a LOT of unarmed/melee attacks, unless it's obviously a suicide mission to get in close. The chainsaw in Vice and SA was my best friend.
If there is a hockeymask article of clothing, I put it on. Same with most masks, actually. If multiple masks are available, I will have a collection.
In Oblivion, my main character was a Dark Elf Vampire Battlemage, because I like originality and non-cliches. Anyway, at one point I became a Gladiator, but as I got higher up, I decided I'd play up my role. I had a Lightning spell(Finger of the Mountain), that before walking all the way up the stairs, I'd fire on either side of the gate, so that it shot up in the air. In this way, I created pyros for myself. I did this a few times until my magic bar depleted, like twice in a row. After that I'd walk up, get my introduction, then the fight would start.
After the fight ends, that's when I'd celebrate in the ring for a bit. Equipping my Telekinesis spell, I'd fling the opponent's shield and weapon into the audience, they always like souvenirs, y'know? And then, re-equip Finger of the Mountain, and blast the body for a bit. For those who don't know, Finger of the Mountain does horrible damage, but it knocks bodies and items all over the place, so it's well worth getting despite being horrible. I'd usually try to make their body land in some humiliating position, OR in the firepits. After that, then I'd leave, get healed, and rest up. And the best part about the Gladiator pit, is they won't attack or shun you, even if you're at the very last stage of Vampirism, so you don't have to do anything else but fight. Totally ruled.