I usually define them as: One of my favourite games of all time, I really love this one, I like this game, or this game is not for me. There's no real score, no real reason, it's just how I feel about them. For me, the positives outweigh the negatives, and the negatives only really mean anything serious if I don't care much about the positives.
Some of my most disliked mechanics exist in or originated in my favourite games. For example, Xenogears is my favourite game of all time, it is also the birth of one of my least favourite mechanics of all time - battle combos, that is combining multiple attacks when a single attack would suffice.
Final Fantasy 6 is another one of my favourite games of all time, it was also the birth of mini-game battle inputs, another thing I loath in RPGs.
One of my least favourite things in any type of game is dungeon crawling, yet I love NES's Metroid, and that game is one big dungeon crawl.
Shallow Mary Sue characters are also a giant turn-off for me, but Skies of Arcadia somehow won me over.
I describe myself as a little dose of toxic masculinity.