Holoman
Lore Master
Something I've noticed: as a general rule, the MC in a YA book is a year or so older than the targeted audience. Most YA characters are about 17. 18 seems to be too old. Even though I doubt a 17 year old and a 22 year old are that different mentally.
(My characters are 14 and 17 at the start of the story, and 17 and 20 by its end...also, both are basically functioning as adults and one has a pregnant wife. Do I break the rule? I don't know.)
Oh you'll be different. When you're 22 you'll look back at your 17 yo self and think "what an idiot"
Istari