My comic is very much in the slow-and-steady category. I'm on chapter five, and I haven't introduced the main antagonist yet. Stuff has happened, plot-important stuff, and will continue to happen, but most of the time so far has been spent on establishing relationships between main characters, introducing additional important characters, and building mystery and atmosphere.
It starts off with a bit of a bang in the first 10 pages (main character is attacked by a bandit! he kills the bandit, woohoo! but no wait what's this, a small bloodstained child just stepped out from behind a tree - what now? D:), but slows down considerably after that, because the story is anchored in its characters, rather than in the plot. The plot matters - they have things to do! - but it only matters if the readers care about the characters.
As for what I enjoy as a reader... I like both types of story! I'm a pretty patient reader, who cares a lot about characters, so I don't mind plots being slow to build, as long as it feels like the author is using the downtime to actually accomplish something. If it's just empty filler - or just comic relief in a story obviously intended to be dramatic, that doesn't actually build towards something that's going to happen later - it feels a bit frustrating. Use that slow time wisely.
I like getting to know characters, and I like getting hints and clues that, if I put them together right, helps me start unravelling mysteries or secrets those characters are keeping, so that's what I try to do in my own comic. My main character has a whole barrel of secrets that he doesn't like talking about, but I drop hints here and there, and establish that reluctance to talk (it helps that his constant companion is semi-mute and doesn't really ask questions), etc., etc.