Just wondering.
The Thirsty Bear is one of my favorites:
http://www.thirstybear.com/
Excellent tapas, and they've got some really tasty beers too...
Cha Cha Cha
I love Ramblas on Valencia between 16th and 17th. Go with a big group. And order pitchers of the pomegranite margaritas.
another vote for thirsty bear
Just *dont* go to Esperpento. I went there last week (on 22nd and Valencia) and the food was pretty mediocre.