I like the 18 inch Zildjian ZBT crash cymbal and the 14 inch Meinl HCS hi hats. A Sabian B8 cymbal set is on the Yamaha Stage Custom kit at the band's practice studio, and they sound pretty good for the classic rock songs that we play. They sound nice and are moderately priced, that may be why they are popular.
I think they're popular because they're cheap first and foremost. They were bundled with an awful lot of first drumsets and while you can upgrade those beginner drums with new heads if you want to upgrade cymbals the only option is new cymbals.
hahaha the practice kit i use has B8 hats and a ZBT ride! i will say the ride is heavy and pretty decent, the hats are a bit on the crappy side.
The Sabian B8 hats are also very tarnished looking, they just look very cheap.