A 2E Conjuration specialist. It was at a con (don't recall where or when) where a couple buddies and I got into a "high-level" game alluringly titled "Hunt for the Tarrasque" or some such. The characters were all 13th-16th level (my conjurer was 14th) and we never did face the tarrasque... that wasn't the point.
The reason I found this the best one-shot character I've ever played was that I got the opportunity (read: was forced) to break out of my "usual" wizard mode. Bereft of all the "gotta have 'em" Evocation spells like magic missile, fireball, and lightning bolt, I found myself racking my brains for the best uses of each of the spells I had. Three important lessons came out of this game:
* Summoned monsters make good (read: expendable) scouts.
* Power words wake the party from sleep
* Mid- to high-level assassins tend to have few enough hit points to make them vulnerable to power word, stun.
The fight with the NPC party at the adventure's climax was the most memorable con experience I've had. (sigh) The comment the DM made (that the use of spells was "perfect") simply added to the day. All that, and my character died in relatively noble sacrifice circumstances. (The cleric had a rod of resurrection... and made heavy use of it. "No, bring back the paladin... he's the only one of us with a chance against that pit fiend!")
Other fun stuff: silence grenades... the anti-magic shell over the enemy wizard: "the best gift he could possibly give us"... the enemy 1E monk that basically tore through one PC per round!... "perfect" paladin play... multi-wizard collaboration... bypassing red herrings by intentionally ignoring them...
Ahem. Well, having that much fun with the adventure certainly puts additional "shine" on the character I was playing. More fun than the dead gnome.... Looking forward to more character stories...!