Which sci-fi titles (movies, books) do you consider comforting, cozy, something you come back to from time to time? For me, I guess it is The Matrix. Still holds up to this day, gets better with every re-watch, and gives me a sense of peace when I need it.
The first couple seasons of Sliders are really comfy. It starts fast, episodes are self contained, and the world is usually in a slightly better state at the end of each episode. Often it’s thought provoking too, but not in a Black Mirror doom and gloom way.
SG1 is great and can have the same feeling, but it takes a couple seasons to get there. Definitely worth watching in my opinion, but if you want an immediate hit of comfort it may not work unless it’s a rewatch.