The handle 'Jaz' is one I've been using on and off for RPG-related stuff; my primary Elder Scrolls characters (with the exception of Cyrus from Redguard
) all bore names starting with 'Jaz': Jazintha, Jazeera and so on, but
originally 'Jaz' was the name of my beloved first p&p Star Wars character who died a most gruesome (and heroic) death back in... '97 *sigh*. All other Jazes are named in his honor, but none ever came close. He himself was named after the IOmega JAZ drive; our GM demanded that we came up with a nickname/handle/whatever for our guys within 2 minutes or they'd have to go by number only, and folks at the next table were discussing magneto-optical drives (so I thought "MO drive... ZIP drive... JAZ drive...that's it.")
Kewl, eh? Try that, person-over-30-who's-reading-this
Okay...
Doom: Speeed (with 3 e). Because I was such an incredibly slow player.
Descent: Compass. I couldn't find my way out of a room with just one exit.
Quake: Kobalt (one of my RL nicknames is 'Nickel' and when playing on my first LAN I didn't want the other guys to know it was me... and the elements bordering nickel are cobalt and copper)
HL: Krefeld (I have a special love-hate relationship with that town), then Crowfield (for globalization's sake - it's still the name I use most often for online accounts).
CS, Q3A: Crowfield
UT: Bite-Me_Willi (don't ask)
Battlefield, DoD: [LYONER]von_Hoell ([LYONER] is the clan's name, and it's an in-joke, so... don't ask)
RO: {GD}GG while I was in the {GD} clan, otherwise Crowfield. They called me GG because I always chose the RO model that looked a bit like GG from the movie Stalingrad, but later it came to stand for 'grenade girl' (at that time, nobody hit anything with those potato mashers and their fickle physics... I did).
So you see, I do remember all my online gaming nicks, and I tend to choose different handles for different games. When it comes to forums, I usually pick a gaming name suiting the forums' topic.