In 2015-2018 I used maxed MacBook Pro 13" and I was happy to play many titles from the X360 and PS3 era. Borderlands 2 and Pre-Sequel were my favourite games at that time and Mac ports were made well enough to play on medium-high settings.
Now I own maxed MacBook 12" 2018 and mostly play indie games like Celeste, Super Time Force Ultra, Skulls of the Shogun. The cool thing about most indie games is that they don’t require advanced hardware while offering loads of fun. Mac ports are quite popular too, so no Bootcamp required.
For decades I was mostly console gamer, therefore I prefer playing on a gamepad. Also, my general nomad work setup is Magic Keyboard + Magic Trackpad + Tiny Tower laptop stand. So even if I play just once a week I carry Dual Shock 4 with me for gameful quality time