The only ones that gave me trouble is the 6 L cases. The one with only 2 edges oriented, those right? They were a pain for me. Those and the like I think (i closed wiki page, sorry) its fish? Its like a corner, then 2 eedges in a straight line. (here if you set up cube doing (r U r' (sexy 5 times) r U' r') thats the "fish" or something I was talkin about. Yea fish and the L cases gave me trouble. If you knock those outa the way the rest are soo easy. Maybe I only found them hard because I learned 4 OLLs a day