I like the most ergonomic shape possible -- and small because I have small hands. Titec seems to keep changing the names but these look like mine.

http://www.chainreactioncycles.com/M...px?ModelID=558

Depending on how much space you need for your hands between the bar ends and your levers, WTB grips are easy to trim shorter.

Bubba has gone through a couple pairs of bar ends that had odd high tech looks to them but ended up being very uncomfortable. He likes LP Braids Jr which are very similar to my Titecs but a little larger.