Surprised that people laud BSG for it's acting . . . aside from Olmos as Adama, I thought the actors portraying rest of the characters - Tigh, the President, Baltar, Starbuck (especially Starbuck!), etc., were pretty bad.
Tigh- the guy was protrayed pretty well as an unstable, formerly great, drunk, I thought.
Baltar- creepy strange scuzzy dude vibe was pulled off real well. I was only screaming at the TV "Why are you fools trusting him?" Besides us knowing he was bad, you could simply tell he was a psycho.
Prez- I thought she did all right. Wasn't iron handed enough, too soft, as expected of a peace loving civilian who didn't quite realize what was going on at first.
Starbuck...eh, I agree. Not very spectacular.
Apollo- portrayed the "fighter pilot" swagger/attitude pretty well.