When I first started, I used to love chronographs and moon phase complications. The busier the dial, the better
These days, I find myself favouring simple 3-hand dials. I am quite indifferent about the date function, as its absence means one less thing to set when I put on a watch that I haven't worn in a while
I think the only complication that I would wish to have on a watch is a power reserve indicator. Quite satisfying to watch it go up as you wind the watch