the stupides thing you've done in oblivion

Well in the XBox 360 version I was doing some Guild Quests... can't remember which ones. Anyways halfway through a mission I got the stupid glitch to say I'd been kicked out of the guild. Instead of going and getting re-instated, I just finished the current quest because I knew what to do.

So afterwards I went and got re-instated, and had to start the quest again. Only problem was that I couldn't finish the quest, because I'd already finished it. The game just wouldn't register it.

So all my quests for that guild were stuffed, and I only had the single save file.

So I had to start from scratch.

I used tes-construction tool to make my char invincible so I made a bow that like completely drain someones fatigue. So I went through the game shooting things and then one day I shot a craze woman and she had reflection armor so the arrow went into me and there my ultimate character lay totally helpless ....LOL with no fatigue

well im gonna go off topic here for a sec lol
i did something in morrowind haha
i was really buffed and stuff, had loads of stats so usually 1 hit kills, then i installed a mod which added dragons to the game, then after a long travel for a quest, i had to go walking for like 40 minutes, then i find one and with all my confidence i shoot him with my uber spell and he didnt die lol... i only took like 2% health then he attacked me and i died with 2 hits x_x

i almost started banging my head against the wall lol

Apart from the usual not saving enough.

I would say becoming a vampire. It seemed like a good idea but it is such a pain as you can't go out in the daylight and then to get the cure is a nightmare. I died so many times and will never be a vampire again.

The stupid thing that I've done in Oblivion is I kill my horse in a combat. The other stupid thing is I hit a guard during a combat, so I get a bounty for my head.

I played through the game to an extent a few times. When I started new characters, I tend to rush into quests that are way too difficult for me. It's not fun to die in 2 hits. Being 2 shotted is hardly manageable.