I might feel smug but I'm not sure.
Is it similar to happiness but with more self-assurance?
At any rate I'm sitting at my desk in the lounge room typing up an official article. By official I mean a pitch-accepted-will-pay-me-money article for a biggish publisher.
The sun is shining through my window while I write for money. The cat is asleep. I have a nice cup of tea. This is everything I ever wanted in just this one moment.
Maybe I feel happy?