I've now seen Episode 1 (Series 1) of Stella and, as comedy-drama goes, I think this is as good as it gets.
When judging sitcoms and comedy-dramas, there's a level of quality above which any "extra" quality is purely a matter of personal taste.
Stella is, for me, in that top echelon.
It's not jam-packed with jokes but, if it were, it wouldn't be comedy-drama.
In fact, I don't think there were any jokes in Episode 1: there was, however, a lot of superb character-based comedy, some wonderfully funny and entirely natural dialogue and plenty of well-written and very well-observed drama.
TV drama for people with a sense of humour doesn't come much (if indeed any) better than this.