What's wrong with me?

All four of these options may be true but this particular thing seems to be some sort of OCD-esque neurosis that I'm sure almost everyone has some form of.

Numbers increasing is kind of what video games are, so it's no surprise you like seeing a number go up.

I like it, too, when a game offers to tell me how many hours I've spent playing it, but I can enjoy it just fine if it doesn't, and I don't have any emotional response to hitting any milestones. I don't even think about certain time marks as milestones.

I do, however, take some pride - no, not really, but I guess, adjusted to context, you could call it that - in seeing that I've clocked more hours than averages as reported on How Long to Beat in games I really enjoy. That's because I like to take my time and enjoy the little things in the environment and all the details and effort artists have put in them, and immersing myself as much as possible in the game world, so when I see that it's taken me longer than average to complete something, I think to myself "I've done a good appreciating this game" and feel a little warm inside. My most recent example here is the Witcher 3, which I completed (both expansions included) after 261 hours, when the average on hltb seems to be 191. I also remember clocking 22h22m14s for the Last of Us, which got a groan out of me for not looking at that tree for 8 more seconds :P

I rarely ever hit triple digit hours spent in a game unless it's an MMO and even then 20% of that is probably idle time.
I bounce around way too much between games. That said I can get a kick out of just seeing that I've put 20+ hours into a game. I guess it's a sense of having put an amount of time and "effort" into something. Even if that "effort" amounted to me just laying in bed and pressing buttons, which is not really an effort.

It's probably something to do with feeling you're getting good value proposition out of the game you bought and the money you spent. Personally it's a little depressing sometimes when I look and see 700 hours of Overwatch played... or 10,000 hours of EverQuest... you know?

Just a side-note: Steam and Xbox track hours spent for each game (so that's not dependant on any ingame time tracking).

As someone who doesn't usually stick with one game for very long, I like seeing my playtime number hit milestones for the games I do play a lot of. It's nice to see that I've actually put a lot of hours into a game for a change.

I also like seeing that I've put time into a game. It means that I can still gather enough focus and energy to stick to one thing, instead of being distracted by the zillions of things around me fighting for my attention. It feels healthier to enjoy one thing to completion than to dabble in a bunch of things and never get much out of any of them.

I don't usually pay attention, but you just made me look.

Fuck. What the hell did all that time come from? Probably back when I used to be into trading items. Still, it's a lot more than I expected.

I'm the opposite, and feel guilty or bad when I calculate how many full days of my life I've spent playing a game. Different strokes.

Yeah I like keeping track of my playtime just to know. And when you are at like 296h in a multiplayer game I definitely want to do those last 4 just to get to 300. :P

Sometimes when I start and stop a game however many hours in, once I decided to replay it from the beginning months/years later, I wish I could reset the time to give a more accurate reading on Steam.

I've looked into resetting Steam play times, and it's a bigger hassle than it's worth.