Man I like TOS!!
Grew up with that and I still think it's the best SciFi-series ever created. I can't really describe what I mean (due to lack of proper english vocabulary...

) but there's so much fine detailed humor and morale/philosophy I miss elsewhere.
(...and yes I know that some -perhaps many- of the settings/dialogues/characters were ... ludicrous, especially the 'effects' were, but: who cares?)
[Damn, I just remembered the giant stone age spears in "The Galileo Seven" and how the shuttle was electricified to shock the attacking creatures and finally Spock -in big trouble losing military authority over the remains of his away team- desperately burned down the last bit of shuttle fuel for help, leaving Scotty with a very laconic (sorry for german) "war sicher ein ganz nettes feuerwerk"...
And does anybody remember the scene from "The Conscience of the King" were one of the last three witnesses of the mass murderer Kodos (two of which living onboard of the Enterprise...LOL) sits back in his chair...relaxing already knowing his life is endangered...singing...and a very bad hand in gloves comes from the off poisoning his coffee mug with a spray can. That was fantastic.
-> I just got carried away - sorry dudes...]
Enterprise was not good imo, mainly due to the muggings of Scott Bakula, the worst of all Trek Captains.
Granted, Bakula isn't deNiro, but the worst of all captains? I couldn't stand Sisko with his ever-the-same-looking face (I think I read somewhere this guy is an acting teacher...LOL...see him in American History X and you'll wonder when he'll put on his red commanders' uniform) and Janeway was even worse. All this Neelix/Tuvok/Tuvix-stuff just wasn't meant for me...
As for the remake of Battlestar Galactica: I agree with KP and others that this is a very good series, IMHO the best since TOS. The story is fascinating, very well focused and not overcrowded with dozens of exotic species and new story lines. The characters are well developed, versatile and realistic...real people with credible problems. Personally I like to see dirt, sweat, blood and despair in the faces of people in such a setting. And of course, the effects are very good, but this only adds to the quality.