I love "Halo". I find it entertaining, well made in most aspects. As someone said, Pablo Schreiber is greatly underrated and I think that's owed to his masculine hero image, but he can act, I can tell you that. Ironically, even for a character that's supposed to be a silent super-soldier devoid of our "weaknesses", just following orders supposedly -- Schreiber's Master Chief is both a joy and enigma to watch. His mannerisms are on point and he's able to communicate a lot of confliction and other feelings just with his face. Great casting there! The other Spartans are well-cast too. Natasha Culzac starts a bit in the shadows but there's an episode in the second season where she is given enough to show her range as an actress, and her performance had me in awe. Kate Kennedy is consistently captivating on screen, it seems the more she's given to work with the better the scene with her in it. Natasha McElhone is, in some scenes, in a league of her own, which befits an actress of her renomé. But it's a compliment to Halo that the rest of the cast isn't far behind in terms of acting prowess, the show's so much better for it.
Halo doesn't fumble on the CGI. The Covenant are done masterfully, it's all really impressive, at least for a TV show. It's also done with finesse. When plasma bolts are flying, I have to say I am not getting tired of it. All the better stuff's not blown up all the time, the show has commendable pacing switching between meaningful engaging conversations and the rare battle which too seems to be put in the right place.
On a rare occasion, I feel Halo falls into cookie cutter villain territory, but it recovers quickly enough as the more complex elements of the plot are woven back in and get back into front seat.
I find the plot to be complex enough to be thoroughly entertaining.
Halo is a package. You may not vibe with all of it all the time, but it's been long I've had such a pleasure watching a TV show. There's marvelous, ingenous sci-fi out there, and while Halo could be better, I think it deserves my score. It had a tall order to fill -- please the gaming fan base and what not -- but it won't be forgotten by me the way I forget a lot of other stuff I discover and put away.
I hope Halo has a long run on television and I can only hope the actors are given great material to show off their range. It's not often that so much of the cast is so consistenly good, even the chemistry, for the most part(!), works to the cast's advantage.