I'm going to keep this brief to try and avoid spoilers for those that haven't seen the finale, but there may be a few slips.
Over all I have to say this is one of the best series finales I have ever seen. It was chocked full of action, emotion and definitely left the characters with the dignity they deserve, for the most part.
Roslin and Adama's ending was great. McDonnell and Olmos are incredible actors and the finale only made me respect their abilities more. Emotions were high and seemed pretty genuine. Apollos ending was a bit lame, but since the character only had a few truly memorable moments in the entire series, I didn't really notice. Baltar and Caprica's ending was really good and I think the way they fleshed out Baltar in the last few episodes was excellent. I actually came to empathize for a characters that I had spend most of the series wondering why Adama hadn't flushed him out of an airlock. Saul and Ellen had a good, if uneventful ending. Theirs was more meaningful in flashbacks than it was in "current" time. Tyrol's ending was uneventful, but understandable given what he's been through. Hera, with parents in tow, ended up having a bigger part in retrospect than I thought, which put the whole "survivial of the species" tag she has been carrying in perspective and made sense in the end.
While there were actually 3 disappointing parts of the finale for me, 2 of which are minor so I won't mention them and risk ruining it for everyone else, there was only one that really bugs me. Kara's ending was kind of dumb. Again I won't go into detail, but after Kara's ending the only thing going through my mind was WTF? I don't like being left with a huge question mark in a finale. It's not like this is a cliffhanger, it's the end of this story. Now I do understand what was implied by Kara's ending, but I just don't like it. It doesn't sit right with me in the context of a sci-fi show. For those of you that have no idea what I'm talking about... watch the show. For those that did watch it and understand where I'm coming from I'd like to know if you agree and what your take on the finale is.
Depsite my few complaints, I was impressed with the finale and will sincerely miss BSG. I have pretty much quit watching television, with the exception of BSG, & Heroes, which only serves to speak for how much I like those shows. I am genuinely sad to see BSG end and will miss these characters I have become accustomed to spending time with each week. Sure they will live on in my DVD collection, but that's not the same.
On the upside we have Caprica and the BSG TV movies to look forward to in the future.