I'm a 50Hz fan. I went 50Hz even though my budget was more than capable of buying a 100Hz set. I watch plenty of 100Hz, and you just kind of get used to the judders/pixels though. But then going back to 500Hz everything looks that bit more natural. I like it anyway
Worst thing about 50hz is the background whining you can detect sometimes (only if you're an obsessive freak like me). Never there on 100Hz tellys.