I'm still somewhat mixed on Universe myself. I like it, but it still really doesn't feel like Stargate. And I'm not sure whether or not that is good or bad. The last few years (of both Atlantis and SG-1) have mostly felt like recycled shows, with plots we have seen over and over reused. The only thing that really kept me watching was I cared about the characters and wanted to see how the events effected them differently. So far Universe hasn't been much different, other than I don't really care about most of these characters. We'll see if that changes as the season goes on though.
Greer - He probably the most interesting guy in the show so far. He has what seems like a fairly generic and cookie-cutter "I'm pissed off at the world" personality, and yet we keep getting little glimpses of a deeper character, particularly in the episode "Power." There was that great moment where he is apologizing to Young for disappointing him, and there was that little bit where he is talking about being killed by the star. That is the kind of thing I really like about his character.
Eli - Eh, I like him so far. He's no Davit Hewlett/Rodney McKay but he is kind of amusing.
Chloe - Hot, but she is kind of annoying and I don't really care for her character.
Scott - He is probably one of my least favorite characters on the show. I don't know if it is the character or the actor himself, but I don't really care what happens to him.
Young - He has started to grow on me a bit, especially because of the dynamic he has with Rush.
Rush - Another of my favorite characters. I like Robert Carlisle a lot and he is great for the role. I'm interested to see how he lost his wife and why he was so motivated to find the Destiny. It should be interesting to to see if he is as selfish/scheming as Young would believe him to be, or if he really does care about everyone and just has his own goals on the side.
Tamara - I like her so far too. Although one this I thought was funny that my mom pointed out to me, they are supposedly stuck on a spaceship, with very little water, very few of these people have showered, and it has been a few weeks now, and she always has her hair done up all fancy like. She wouldn't have time to do that, and without showering there is no way she could keep it looking nice. I wouldn't have noticed or cared if my mom hadn't have pointed it out, because Tamara is hot. Now it's pretty obvious that the only reason they do that is to draw in male viewers.
Some other thoughts I have so far. I'm not digging the a lot of the Pop music they have as a soundtrack so far. It's out of place and it really feels like they are trying to make it more like something you'd see on Heroes or some crap like that. I've also noticed (and this goes for Atlantis too) that the 'realism' is starting to fade more and more. Obviously this is Sci-Fi and has always been Sci-Fi, but what really drew me in to SG-1 was the way it was grounded in reality. It seemed like there could actually be a Stargate somewhere under Cheyenne Mountain. And after some blunders in the first season or two, they worked a lot closer with military advisors to make the military look more like the real thing. I think Universe has really stepped away from a lot of that. If I start to care about the characters enough I can over look that, but at this point it bothers me.