B5 was a show where a lot of character actors got main/recurring roles and really got the chance to shine.

I respectfully disagree. I am currently in a rewatch, and there are two major issues I now have with SG1 (and don't ask me why it didn't bother/I didn't notice before): how much civil oversight over the military is antagonized and how often events or explanations are recapped in dialogue.
In Atlantis, Weir and Woolsey are really respectable civil leaders with authority over the expedition's military and the relationship between military and civil personnel is much more balanced (plus every now and then it leads to interesting conflict).
Also, this frequent summaries and retelling is often a point of critique for more modern shows ("modern shows get made for second screens"). That happens much less in Atlantis.

i pefer sga continuation of sg1's mission, sg1 by the time it ended , it was already past its prime. the show was reaching by the time Ori was nearing is defeat. SGA had some upcoming storylines if it wasnt cancelled before s6. they already alluded to A,U appearances of enemies in the main universe. also ghost in the machine, repliweir foreshadowed future advanced races in the galaxy.

They also only have 5 seasons compared to probably hundreds.

Oh right, I forgot. It must have just been some fever dream.

Hah! Never! You can have my bat'leth Thorn when you pry it from my cold, dead hand.

I just left th here since it's a meme.

Tell me about it. I still grieve.

Season 2 is coming

The fact Firefly is considered one of the best of all time even with only one season says a lot more in support of it than against it.

That's what the Firefly comics are for. I don't need any reboot. Those comics are all I need.

Eh, I make mistakes all þe time, but in general I don't change th in quotes, and since it's a meme... I intentionally left it þis time.

It's funny so many people are catching me out on my mistakes, þough.

We all have our faults.

(/s I like generally like star trek and bab 5 and star was and firefly and most stargate. ST:Discotheque and stuff that runs with it annoys me though.)

They planned for actors to come and go...mostly. One interview with the crew I heard, they said they built "trap doors" into the show so that characters could come and go, being replaced with suspiciously similar substitutes. There was supposed to be a way to get Talia back after Bester Psy Corpsed her, remember the weir dude with the transparent head, the "vicker?"

As for the network drama, for once it wasn't that stupid. The network B5 was airing on was shutting down, so their Season 4 would be the last possible to make. So they ripped out all the B plots to get the story wrapped up, which made it feel rushed and stressful, they were getting ready to wrap the show, a couple of the stars got jobs elsewhere, and then another network picked them up for the 5th season. So the B-plot arc, Byron and his telepath cult, get stretched to the main plot of the season, along with some hastily written filler.

Combine that with the shaky first season which consists of a lot of adventure of the day episodes, cheesier production etc. that on first watch feels like dollar store Star Trek, but it's all background for when the plot gets going, and you've got three very strong seasons of sci-fi television.