Loaded post incoming:

My tastes I think have "adjusted" with my age.

Always have had a thing for "tactics" games, was mostly into shooters (1st and 3rd person), jrpgs and strategy games.

I have moved onto liking but being terrible at metrovanias ( thoroughly enjoyed Ori and the Blind Forest) and Hollow Knight ( some gamer pstd inducing platforming for me that is horrible at it but otherwise is a great game)

I feel I enjoy more lore heavy or story focused games which push heavily into DnD type games like Pathfinder, Pillars, Baldur's Gate, Planetscape Torment, etc

It was Undertale that really helped pin down what I enjoy about gaming. I have always enjoyed a good roleplay like joys and freedom of Fallout 2 for example.

It was only untiI was confronted with the thought that I might have made a mistake buying Undertale and judging it on graphics but then, pleasantly, being proven wrong; did I really realise the value of good game comes not from graphics alone, but how well it can express and execute the core of what it is trying to do in a way that I feel respects who I am as a player

That is incredibly broad, but I suppose if I had to try condensing it into something shorter :

"Is this game fun, engaging and/or can I see a passion in what I am playing"