I'm not going to take the time to make screennshots.
CK2 = 787.4 hours
EU4 = 500 hours
HOI4 = 106.7 hours
Imperator Rome = 25 minutes
Victoria II = 77 hours
Stellaris = 117.6 hours
At least some of that time is actually reading the maps. Just going over them in detail.
One thing you will notice is that I spent way less time in V2 than the others. This is mostly because I found V2 really dated in some important respects. CK2 is just much more fun and unique. HOI4 I often found bland, and I think that time is 100% in Kaiserreich. Stellaris is a shitty game and every second in it was a waste that I subjected myself too just out of this idiotic fanboy thinking that I would eventually like it and a feeling of completeness (because it's Paradox, you play it).
TLDR I liked CK2 and EU4 (some vanilla, some MEIOU and Taxes) and kind of stopped playing V2 when those came along.
Old World is completely fucked up for me because it has this shitty glitch where it won't actually close. I have to restart the whole computer to relaunch it. So it's run up into the 300s territory from me letting it sit there for days on end before I actually want to play it (it's not really using any computer resources in the meanwhile) and have to launch it. I have a problem with it where the game has a bug that it won't let me play the Hittites I paid for and I haven't figured out how to actually fix that.
I'll tell you other strategy:
TOTAL WAR LIKES
15 hr in The Great War: Western Front (this isn't saying much, jury is still out on quality)
22 hr in Steel Division 2 (brilliant game; hard to really rack up time in this, as it's just 30-ish minute matches with no campaign, it's a very easy game to sit down, play a match, and then actually get up and go do something productive)
10 hr in Terra Invicta (wanted to love it, but it's too demanding of a game)
20 hr in Atilla (also demanding and difficult)
64 hr in Empire (little of that was actually deep into a campaign, more a lot of restarting, getting aggravated, crapping out; my Sweden campaign, up to 1750-ish, is my furthest thus far)
16 hr in Napoleon (I don't like it)
19 hr in Rome 2 (I like it)
57 hr in Shogun 2 (I like it a lot)
5 hr in Wargame: Red Dragon (fuck this, I bought Steel Division 2 specifically hoping it would be comprehensible)
CLASSIC RTS
128 hr in Age of Empires II
93 hr in Company of Heroes II (GOAT game)
(Missing numbers for Cossacks 2)
2 hr in Cossacks 3 (boring trash)
9 hr in Empires of the Undergrowth (it's more than a little shallow, its subject matter limits it)
246 hr in Rise of Nations
4 hr in Stronghold Crusader (learning curve)
BOARD GAMES
41 hr in Axis and Allies 1942
106 hr in Ozymandias (the chad 4X fast-casual game)
33 hr in Twilight Struggle
OTHER
58 hr in Anno 1800 (very good game)
3 hr in DEFCON (hard to wrap head around)
10 hr in Interplanetary (wanted to love it, but it's tedious to play)
15 hr in Mount and Blade: Warband (mostly Viking Conquest, hard learning curve but worth it, very engaging when I boot it up)
2 hr in Mount and Blade: With Fire and Sword (just never really started it)
16 hr in Civilization VI (ultimately didn't like it)
16 hr in Surviving Mars (great game, just difficult, kind of lost my attention but I mean to go back)
2 hr in Tlatoani (demo, fucked around a bit, forgot it)
If I had Tropico 4 or Age of Empires III on Steam, those numbers would be very high. Age of Empires III, my gut feeling is that if I put 250-ish hours into Rise of Nations in college, then I must have put maybe 500 to a 1000 into Age of Empires III in childhood?