Quite possibly not. A lot of Firefly fans do not like his other series at all. And a lot of BTVS and Angel fans don’t care for Firefly. I’m in the latter group. I’ve watched most of the FF episodes that orginially aired, and I don’t get what the fuss is about. It doesn’t strike me as nearly as clever or compelling as either of the other two series. It’s not a bad show (or else I wouldn’t have watched most of the episodes) but it wasn’t anything special IMHO. I wasn’t crushed when it was cancelled, and rewatching some of the episodes on SciFi hasn’t made me long for more.