I've used DMK a few times, starting with my first visit to Bangkok in 2004 (back when don mueang was still BKK). I remember seeing a bizarrely-shaped temple on short final, and the golf course on the airport grounds.

My last visit there was in late 2019; IIRC, the priority pass lounge was a major subterranean dank, and the ceilings throughout the airport are low. Part of it reminds of the horrid NAIA terminal in MNL. There were a few fast food outlets and crappy shops, but don't expect much more out of it.

OTOH, I never liked Suvarnhabumi, save for those cool people movers landside. Oh, and I suppose it also gets a point for having lots of airline lounges.