It's getting a pummelling elsewhere at the moment, so I'll just mention that I think ENT's A Night In Sickbay is underrated. It's not supposed to be taken too seriously; there are a lot of nice character moments; and Porthos is adorable (or adoggable, if you like).
I like it, it has a weird atmosphere, Phlox is fun and, as you said, Porthos is adorable.