Talk about an endangered species...
Seriously, I liked Nemesis--as an average television episode, not as a movie.
I think that Nemesis would have made a better two parter than Descent or Gambit...you could have had the Ent-D saucer crash into Shinzon's ship on auto-pilot to destoy it instead of Data's sacrifice, and could have gotten new bridge sets to boot when they replaced the saucer.
That being said, I don't think it is even really fair to compare Star Trek and Nemesis, considering the differences in the productions of the two films.