I loved SG1, just recently bought all the 10 seasons and rewatched them to cover up the episodes i missed out... then i had my girlfriend watch them and she really enjoyed the show too... and yeah SG1 was more enjoyable with Richard Dean Anderson around...
After SG-1, i bought the five seasons of SG Atlantis... i didn't like it as much as SG-1 but it was still very good, it's too bad they couldn't handle the costs for more seasons... my girlfriend is currently watching SG Atlantis and so far she likes it too...
SG Universe... heard of it but not interested lol... after the ending of SG-1 (i.e. absence of Richard Dean Anderson) and the sudden ending of SG Atlantis, i don't have the heart to follow a new SG series...