I loved the Fallout battle system, you had enough time to think about your next move. Also the ability to target bodyparts was a nice option as wel <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />.
You can combine Turn based with realtime though, Fallout : Brotherhood of steel tactics pulled that one off. You still had Action points and such but they regenerated during what they called Continious turn based.