I'll go first. He's a reborn necromancer wizard, with a 1 level dip into death cleric.
His backstory comes with a clichénwarning for lost memories..
He lost his memory just before the start of the campaign. He was conducting a gruesome experiment on a dog, when something went wrong involving lightning. He died, but also didn't, and came to wandering around his lab years later, clutching the skull of the dog, which had rotted away to just bone.
He didn't have a name at the start of the campaign. I let a different player name him, as his character knew mine from before the accident. He came up with the truly awful name Melvin Kingston, which I've grown to love. He had a massive fear of death, having died once already, and was quite the coward in early levels.
His memories have been slowly returning, and he's had to come to terms with all the evil things he did in his previous life. I recently took a level in death domain cleric, cos we had no healer, and I found the god Jergal, Scribe of the Doomed, who is concerned only with documenting the dead in his great book. Melvin's faith has allowed him to come to terms with death, and accept it as a part of life. (His newfound ability ro wear medium armor has helped as well, lol). I love having 8 cantrips, and so so many spells to choose from. I have so many options!
I love playing him, and I'm loving the progression he's gone through. I have more planned for him.
Now your turn!
Mine is Binky the Blemished, a butt-ugly gnome druid who is essentially a glorified livestock handler. He wears a mask because his face is so ugly it provokes a fear response from people, balanced out by Binky being a super-virgin. He has to roll a CON save if a female character ever touches him, and if he fails that save, he faints.