Meh, Battlestar Galactica is just another drama tv-series with relatively few fighting/aliens/<things that make a scifi...scifi>.
I used to watch Star Trek and it was decent, but I avoided becoming a 'trekie' like the plague. I abhore Star Wars. While the ideas are creative and the graphics cool, I want to stab myself in the ears every time I hear the horribly, horribly, HORRIBLY unintelligent dialogue that has been dumbed down so that a 5 year old can enjoy it (the new ones at least, the old ones are -ok-). Really ruins it for me.
If you want a good scifi show, go watch seasons 1-8 of Stargate SG-1. Post season 8 they get a little meh and the Atlantis spinoff isn't as good, but both are worth watching if you enjoy the first 8 seasons of the original. Maybe that's just my thing though, I happen to enjoy the incorporation of history/mythology with technology/aliens.