I like big crits and delight when NPCs score them against PCs. At my last session, the Warlock NPC fired off two eldritch blasts at the Sorcerer and scored two criticals. Tears of joy!!
On the other hand, once when I was a player, I had a DM who straight-out told us he considered the game a chess match between him and his players and would have probably had us roll to avoid getting killed by falling branches while walking through the forest if I hadn't preemptively mentioned that I walked through the entire forest with my shield held over my head to avoid being killed by falling branches because I knew he'd probably try it, lolol.
I once had a lightsaber, and the DM literally had me roll to see if I tripped going up some stairs. I fumbled and killed another player with the saber.
