Evil, I know! I recently decided to finish off all my BGEE saves before trying something new.
So far I've managed to complete runs with Assassin, Archer, Cavalier, Fighter/Illusionist, A Dwarven Defender led all Lawful Good party, Level 2 Conjurer dualled to Fighter with staff specialization (fighter with scrolls and wands, woohoo!), and a two character run with just Ranger/Cleric and Wild Mage.
Still to complete: An evil party led by a Dark Moon Monk, a party consisting of every Druid kit, an all mage party (Good & Neutral), an all mage party (Evil & Neutral), A Swashbuckler, and a Mage/Thief.
After that I have to debate whether or not unfinished Roleplay characters should be included. I've started Paladin, Bard, Cleric, and Fighter RP games, but I've yet to devote the time to any of them that the endeavor requires (much less consider whether to post the results here as other brave souls do).
If I added in all my old saves from pre EE games it would take me much much longer. So, for those with many many unfinished runs, perhaps the challenge should be to complete ten of them before starting a new character.
How many "limbo characters" do you have?