Haven't seen Star Trek (sorry, Trekkies), but I love Star Wars!!! I used to have the old trilogy on VHS. Loved C-3PO and R2D2, and the Ewoks, too!!!  The old Star Wars trilogy is a work of genius in my eyes. There's great aliens, cool space weaponry (like the small moon...er, space station, and the Milennium Falcon, and the giant four-legged robots in "The Empire Strikes Back"), and an awesome storyline. 

The prequels are visually great (cool battle scenes, especially in Episode 3), but that one guy who played Anakin Skywalker sucked. I didn't like him at all...  ....but he got better when his legs were chopped off.