What would you guys consider more important, Bulking up and getting bigger or getting leaner and having visible definition.

I'm not skinny, I'm above average (you can tell I lift when i wear a tight shirt) BUT I have a small belly, Doc says I'm ~18% Body fat, What's more important to you guys? leaning up and having 6 pack ab's, obliques, definition, etc. OR getting jacked: Big chest, big shoulders, wide lats, etc.

Which would you choose and why? and for those who say do both, I've been lifting/working out for a year and a bit (used to be 210lbs, Im currently 167) so I don't think my body is able to do both anymore.

Anyways back to original question, Bulk or Cut? Which would you focus more on and why?