I find the creation of new characters to be a fascinating process. What they've done, what they're capable of, and how they grow. But I often find myself overreaching when doing so.
Just as an example, I recently created a Warforged (Think a magic powered robot) character for Kntoran's 3.5e game after my previous character there was blown up. I've only made one post thus far, but already find myself planning ahead all the details for the next level, and the next. Debating the pros/cons of various prestige classes (Which at minimum will take another five levels before he can start anything of the sort), and ooh! Maybe he can take a few levels of Artificer at some point so he can imbue himself with magic and maybe build himself a few construct buddies.
In any case, I do enjoy the planning, but it could be a year or more before many of these ideas are even possible.
Does anyone else do this?
All the time! I sometimes work up elaborate back stories as I plan my future story too. Back when I played more often we'd design a mid-level campaign now and again. Talk about overplanning characters. Those times would be the worst, both forwards and backwards planning.
Daishain,
I really think that is half of the fun. Heck, sometimes I make characters just for the fun of making them and then plan various futures. I'll run a few solo adventures just to see where they go and start over… and yes, I guess that makes me a bit odd.
Character creation is one of my favorite aspects of role playing. I don't really plan too much with my characters usually. I will usually have a plan on whether or not to multiclass and how many levels of another class to take. I prefer to let the story dictate the future more. It's more fun for me to go with the narrative of the campaign and let it influence how my character develops rather than have a rigid story already developed that I try to force into the narrative.
Planning a character works in Dungeons & Dragons where the classes are rigid. But in a classless system like Fate, or Basic Role-Playing, I find it much more fun to grow as a result of experiences. Occasionally you can prepare or train up for what is to come, but often only short term.