Hi -
I've attached a basic FCPX course to this thread [click More Info above] -- if you check out video #20 on Transitions it shows how to access a bunch of transitions [in addition to the default] in the Transition browser. I'm really an audio guy [I don't have FCP here] so I can't say exactly what transitions come with FCP, but according to the video it looks like there should be quite a few. AFAICT you can also add additional transitions, and it seems like there are both free & paid-for options available..