I have 11 50s (Got laid off and had plenty of time to level). I find it a waste past 3. I don't want to spend all that time gearing alts I may never use so stick with my main tank PT, sniper and sorc healer so I'm well rounded for guild raids. The other 50s I mainly did just to do and get the legacy skill ability as well as mules for stashing gear and items in their banks. I'm not surprised a lot of people are content with only 2-3 50s