Depending on the memory in your system, you may want to be careful with the patterns loaded - each one gets loaded into memory as you go and can slow you down after awhile. You can clear ones out you don't need by using the Preset manager (it's become my friend lately). that having been said, the builtin patterns are usually ok, it's when you end up with a set of 50 or so patterns at 1024x1024 that you might notice