Watching one of my cats use the litter box… and it actually goes into the box, not over the side onto the floor.
The first television I bought for myself (circa 1970) was a huge heavy mofo (with pong!). It lasted a long time. When it finally died, I hauled it out to the dumpster, perched it on the edge, and tipped it in. When it hit the bottom of the dumpster, it exploded with the most satisfying sound. So satisfying that I savor the moment after all these years.
Watching/hearing my dog taking a nice long drink of water.
LOL, me, too! In fact, I like it so well that I’ve trained him to drink on command, right before bedtime. Otherwise, he forgets sometimes.
Emptying a jar from the fridge and reclaiming the tiny amount of space. Even more so when it’s something that’s been there for a long time, like that jar of sauerkraut with one serving left in it. Dropping the jar into the recycling and later opening a fresh jar is also more fun for me than it deserves to be.