Personally, find it depends on the Rp, but I like stats. 

Keeps things simple, shows who is suppose to be on equal terms, with things like Bleach.

Basically prevents a lot of jackassery with jack-of-all trades characters becoming king of them too, and helps players be more honest. You are always going to have that guy who tries abusing it, but easier to keep honest by using stats, and easier to spot him. It sets an expectation.

At the same time, nothing is a bigger turn off than a huge stat system I need a PH.d to figure out. Keep the stats simple.