I can't seem to enjoy playing any one character for a significant amount of time.

For a few days I might think a certain role would make for the funnest character I've ever played. I'll dedicate a couple days to writing my role and figuring out how my character will act, what his attitude is like. Even when I love my role, I usually wind up not playing these for some reason, or not even attempting to RP their personality.

The characters I do play remain fun for all of two weeks on average.
After that, I just think "Other-character-idea sounds like alot of fun to play".
When this happens, I let my character self destruct. I'll let him run around with flight/teleports/returns/heal-pills and even detect invis.
Because I know in my head, I want someone to kill me and take all my gear. So I have an excuse to play something else.
And then I'll tell myself "Why am I playing a character I don't enjoy playing?", delete, and proceed to play another shitty character.

Anyone else had this problem?