I am. I made 8 characters at launch (one for each class): my ranger main is around 50ish, with the next several closest near 20. I've found that if I get tired of doing stuff with my main a quick switch to an alt (and therefore a fairly big switch in playstyle, location, and level) can often help that feeling. I stick mostly to PvE but have jumped into a couple PvP and WvW matches to mix things up.