Mods are interactive. Just because they don't ask questions or make new threads doesn't mean they don't want to interact. These people are chosen because they know what the hell they are talking about. Just because they are moderators they aren't obligated to know everyone in their forum and always be the one starting everything.
I also don't know what forums here you visit, but all the forums I visit here the moderators (and moderators from other boards) are very interactive, friendly, funny, and also know what they are talking about. There's no better way to close a thread then a mod party imo.
Like you said, this place is bigger, with alot more people than where you moderated. It would be a tough job moderating here. There are also a lot of, for lack of a better word, idiots here who troll (guilty), make threads before using search function, make stupid/flame threads, and a whole variety of shibaz. If you watch them closely they only act on things like that.