I'd factor in quality dive sites, and maybe 'name recognition' since I'd enjoy hitting some of the places I had or would hear about from others.
1.) Karpata - really popular, lusher reef than some sites (although I, too, love Sweet Dreams down south - very lush). Since Karpata commits you to a long trip home since it's on the 1 way stretch of road, I like to hit Tolo 1st, which is a really nice all around dive with pretty easy entry.
2.) Bari reef - your house reef. Famous for high species diversity in some study, and just being a sweet stretch of reef.
3.) The Cliff - topographically different due to a fairly shallow vertical wall.
4.) Hilma Hooker - the signature wreck. Swim out past it & I believe you can see the double reef system the south is known for; I enjoyed seeing at at Angel City.
5.) Cai, but only with professional guide Bas Tol at BasDiving.com. Had a great dive. Previously tried it independently with a friend; much rougher dive & not near as much seen.
If Bari reef doesn't sound since it's your house reef, I agree, Oil Slick Leap is a signature Bonaire dive. The big giant stride in is a fun conversation piece, the reef drop off is very close to shore, and the site has been a really good one. Nice place.
Richard.