I don’t mean that I end up sending my dice all over the floor every few minutes (although I’ve been known to do that to my dicepool after a few beers). I just roll consistently poorly.
My incompetent assassin and ‘Combine-Harvester Repairman’ Tech-Priest in Dark Heresy became running jokes. They averaged just one successful check per session until I eventually got my Tech-Priest up to 70% chance of success in Tech-Use (in Dark Heresy, that’s a god-like success rate).
In Castles and Crusades, I’ve been similarly blighted. My Ranger at least managed to hit targets, but often for just one or two damage. He was a bit of a sod anyway – I think failing rolls kind of suited him. On the other hand, the day that I played a friend’s Illusionist, it was a case of success after success – in one area, he melee’d the combat area clear after a Fighter, a Knight, a Rogue, my Ranger and a Priest had all failed to hit the enemy. Unfortunately, he immediately went on to accidentally blind the Rogue when we went up against the Necromancer in the next chamber, but the Rogue deserved it.
Most recently, I utterly confounded my GM while playing an indie Superhero game. According to the rules, my success rate should have been about 75%. It was actually about 30%.
I’m not a big believer in luck, dice superstition or any other form of supernatural. I just roll badly. Who knows why…