Funny, I get headachaes from playing runescape and the way the character moves and runs is frustrating

, but sure it has a pretty big content and the skills weapons and armor are pretty fun, but the fighting is horrible.
Yes $15 a month might be too much but 1-4 months a year is not bad, I only get to play WoW on certain months, got too much to handle with school and work.
But back to the level 20 problem, try going to a different area of the game design for your level, do a quick search for level 20 areas on google and see where is it that you should be leveling.