I personally use 50 fps on "fullsize" I sacrifice quality for smoothness since my computer isn't the best, but that is settings for BF2. For WoW I use 30.
Here is an example of 50fps if your curious, here is a test clip I made for bf2 of 50fps settings
http://files.filefront.com/BF2+vidfu.../fileinfo.html
you can just use the stream if you want I wouldn't bother downloaded it.
It's not that bad but the lowest fps your computer can handle the better.