I don't mean big things like him being a good father or a loving partner.
I mean little things that just make you think "I'm glad I stuck with you" and "life would be just a little bit worse without you doing XYZ" a couple of times per day.
For me...
My DP is freakishly good at making up rhymes and limericks on the spot. They're always rude and very often offensive about people (including me and him) and really make me laugh. Life would be much duller without his impromptu poems.
DP is also amazing at making cups of tea. He's a scientist so I don't know whether it's many years of lab work measuring things out and stirring things but his teas are fantastic even though he's not been in a lab for about six years. Life would be considerably worse without his tea-making. Even I can't make tea for myself as well as he does.
What about you?