When I bring the bin back in after the bin collection. I always feel physically lighter somehow. When they take the recycling it's even bigger, the feeling of lightness but with an additional warm fuzzy planet saving glow.
Cracking my knuckles 
When I get a popcorn kernel (or something similar) stuck between my teeth and it comes free.
Hair removal. A hair cut, plucking my eyebrows, shaving my armpits, waxing my legs. Doesn't matter, I love the feeling of it being there and then being gone. Similarly popping a spot, using a peel off face mask, using blackhead strips, cutting my nails, removing false nails.
I like treating cradle cap and also quite enjoy treating for head-lice
I also like pulling off plasters and taking off dressings, things like that. I find things like that so irritating that taking them off is like being able to breath after holding my breath for a long time.
At the moment my favourite feeling is taking the face mask off (and visor too at work sometimes) and breathing in some fresh air. Best feeling ever.
After Covid the first time I smelt something properly again was beautiful. Like the world had been in black and white for a while but was back in colour again