There are a lot of types of basil. I've used several, but mostly don't pay that much attention to the variety as you really have to seek out the various types. My favorite is Thai Basil, which works obviously in Thai stir frys or perhaps some Basil Chicken on pizza. Lots of times when eating out Thai food people will push the Basil to the side of the plate and I'll gladly swoop in and take it.
Preference for me on Pizza is to do a quick pesto out of it and put it direct on dough before cheese, etc.