I'm having issues with SGA. For me, at least, it hasn't been holding my interest. I've got it on Season Pass, but it's the one I watch after watching the shows I really enjoy.
Random thoughts while watching different episodes:
First few: "The Wraith are dull. The Wraith are dull. The Wraith are dull. They're like someone tried to remake the goa'uld and slap a new look on them so that they all look like the Morlock king from that unwatchable Time Machine movie a few years back."
The "Society that is engineering an anti-Wraith serum" episode, "Poisoning the Well": I watched this episode on fast-forward and captions for about a third of its total length. My wife walked by, wondering what I was doing, and I said, "It's forty-three minutes in, and they're just now getting over their qualms and testing the thing on a willing volunteer. If this were Farscape, they'd have already tested the thing twenty minutes ago, and four people would have blown up from the poison, and also, someone would have vomited."
The one where the kids kill themselves at age 25: "Wow, this could also be a really interesting philosophical ques... no, no, they're going ahead and having the unpalatable side start trying to kill people to avoid any real moral issues. Whew. Almost had to think there for a sec."
I did like the season-half finale, with the new guy going all Die Hard and shouting, "Let me tell you what you just did wrong!" into the radio. That was fun. The little redhead girl was not at all believable as a commando, however, and the whole situation setting that world up as the bad guys felt forced.
Liked the recent one where it's one Wraith versus Sheppard. (And McKay helping) That one was fun and interesting.
Hated the time-travel one. Found it stupid. The notion that Weir changed the timeline was nice, but good God, you know you only have a few hours to live, your body is shutting down, and you feel it necessary to tell the story about the control room flooding? You feel it necessary to talk about political infighting? I understand that it's a show, and it was trying to tell an interesting story, but for crying out loud, if McKay were half as bad as he seems to be in some eps, he'd be shaking her by the shoulders and shouting, "Get to the point! Tell me that you asked questions about their technology? Tell me that you did some research before going into stasis? Tell me you actually found something beyond five stupid gate addresses that do little beyond set up future episodes!!!" If it had been told in the present tense for alterWeir, taking the audience through the events as they happened, and then at the end, we get to see the tragedy of her not being physically able to tell the new people what she'd discovered because she's too weak or because the stroke wiped out her verbal ability, it would have had real pathos. As it was, it struck my "Good lord, this is stupid" nerve.
(For an example of an interesting alter-us episode of a show, there was a Voyager episode where the crew is about to get home with an enhanced drive, only to have people and objects start degrading. They eventually realize that they are not the real crew -- they're duplicates from an earlier episode, made up of silvery goo with shapeshifting properties -- and they'd forgotten that. And the enhanced drive is killing them. At the end, they try to get the information to the real Voyager, and they fail... and while I had issues with much of Voyager, I liked that episode.
For comparison, this would be the equivalent of starting the episode by having the alterVoyager meet the real ship, and then having alterJaneway spend the entire episode talking about people's slow degradation and sadness and pathos and then saying, 'Oh, by the way, those enhanced warp drives might work for you, if you wanted to...' and then collapsing into goo after spending the entire time talking about character garbage instead of helping, like she was arguably trying to do.)
All completely subjective -- it could well be the state of mind I'm in these days, and I make no judgments of the people who like the show.

And while I didn't like much of the "Sheppard gets it on with an Ancient" episode, I did love McKay's "Oh, god, he
is Kirk," line.