My views on a few strategy games I can remember playing moderately recently (with the main focus on the game's single player since I have a strong preference for single player campaigns over multiplayer skirmishes)
Battle for Wesnoth - I'd probly give it an 8 (9 if you factor in it's free price) - good gameplay, acceptable graphics (it's free afterall), overall good fun.
Galactic civilizations (+ expansions) - probably an 8 from me. A good game with loads of content with the expansions, but I lost interest in it after a while - I'm more of a campaign sort of person than a sandbox player, and GalCiv's campaign wasn't very strong. I'd definitely recommend it if you're a fan of turn based games though - I've found turn based games to be a bit more hit and miss myself which was probably part of the reason it didn't grab me that much.
Sins of a solar empire - 8.5 - I didn't like it at first, then liked it a lot, and then got bored with it. The lack of any campaign/story hurt it here, although I did play a bit trying to grab some achievements, and when I played it was good fun.
Demigod - 8 - Good fun, able to play reasonably quick games, but again the lack of a real story hurt it and so while I enjoyed playing it quite a lot I didn't play it that much.
Supreme commander - 9 - This game has soaked up loads of hours for me, and overall has been great fun. My main criticism with it is the lack of variety - all 3 factions are incredibly similar in the original supcom, and while the expansion forged alliance addresses this quite a bit it suffers from a campaign effectively 1/3 of the length (that is, the same campaign for each faction with tiny differences).
Red alert 3 - 8 - Nothing spectacular or terrible. Entertaining cut-scenes and a good variety of units+factional differences. My biggest criticism is that you play the campaign with an AI co-op, and can play co-op online, but there's no support for co-op over a network (even though you can play normal skirmishes).
Universe at war - 8 - A weak start but it gets better quickly and has some great units in it (namely the walkers) along with highly varied factions. Can get it very cheap at the moment making it great value. It's not amazing, but it's definitely worthy of attention.
Dawn of war - 8.5 - Good but not great. The campaign started to get repetitive since the missions repeated all the time, but overall it was a good length campaign with some replayability (albeit not much) and some nice RPG elements. I didn't enjoy the skirmish side of the game though, which is completely different in nature to the campaign. Overall I preferred the original DoW (+ Dark Crusade expansion) more, but it offers a nice alternative to your typical RTS.
Out of these universe at war and supreme commander exceeded my expectations the most.