Plus, even in FR or another fantasy world, most of the folk are simply commoners, so I'd most likely just be another commoner or expert. They don't have adventures, and have a lower standard of living than I do now. What's the attraction in that?
Assume that you have the opportunity to learn what you need to know to be a character class in 1d4, 1d6, or 2d6 years depending on class if your class allows for it.
**twitchtwitch**
Be 15 again?
By all the powers, NO!
I hated being that age...
If I could opt for being, say, 25-30, that would be alright, but never 15...
But you'd be in a world where being 15 is the equivalent of being 18 in the modern world. the "teenage angst" issues would exist, because you wouldn't have the modern 20th century idea of your biology telling you you're an adult, but society teeling you you're a child...
Seems like you're screwed. How do you get any training in anything? How do you make money? At best you can join the town militia or something, or sign on with a trading company (since most of us have at least some knowledge of math and such), but otherwise you're just Joe Peasant.
You can become a sorceror, barbarian, or rogue in 1d4 years, a fighter, bard, paladin, or ranger in 1d6, or a wizard, monk, druid, or cleric in 2d6. Assuming you have the stats needed to pursue those classes.
Anyway, my answer is i would. I have nothing tying me here, and life in this world seems pretty dead end. With my intelligence (a stat that isn't all that useful here, Charisma and lots of ranks in Diplomacy, Bluff, Sense Motive, etc. are what gets you by in this world, and that ain't my forte) I'd have a shot at being a pretty decent wizard. I probably wouldn't adventure though, i'd find other ways of increasing my powers and abilities. I'd start off by learning spells that I could sell castings of to people to make money, then i'd hire (or Charm) adventurers to hunt down scrolls and spellbooks for me so i could research them. I'd increase my wealth and abilities until i could build myself a nice tower, with all sorts of creature comforts (like a jacuzzi powered by water and fire elementals). Then i'd amass more and more magical power until the next big upheaval comes in the heavens like the Time of Troubles, i'd find a god to slay like Cyric did and thus ascend to godhood.