What percentage of the games that you own have you beaten?

According Blaeo I have beaten 30% of my games. I have to save some good ones for retirement in case I will be alive in that time.

23% according to BLAEO

edited with the site's pie chart about categories

View attached image.

Same as Adam. 23% according to BLAEO. A bit higher if I exclude freebies that I will likely never play (Feudalife, etc.). I should purge all the dead weight from my library at some point...

GameFAQs is a totally different beast than SG. People there probably own a few hundred games and play them very thoroughly. The typical SG user owns thousands and finishes less than 10% by my estimation.

View attached image.

I only keep track of the ones I play on Steam, so here's those stats: 4951 owned (according to my profile), 218 beaten (64 completed). So not that many.
I'm pretty slow at playing stuff, am kinda strict when it comes to count something as "finished", and drop plenty of games if I get stuck or I'm not enjoying them. Add to that that I never bothered to keep track of the games I played outside of Steam (even those that I also own on Steam but played somewhere else for whatever reason) because that would require more effort on my part and I end up with a ludicrously low percentage of beaten games.

According to BLAEO 11% only.

But I have been concentrating more on reducing "never played" category.
its down to 43% at this point. I tend to drop the game when I run out of fun and have to just grind. Then I switch to something else I get fun out of.

According to BLAEO, about 13%

From BLAEO:
3055 games
44% never played
12% unfinished
5% beaten
39% completed

and slooowly increasing. It could be way better, but 2016-2018 me was dumb and accumulated way too many games and there is only so little time. I will never understand the people who just hoard them and never play them tho. Like where is the point?

From BLAEO:
33454 games (+3296 not categorized yet)
99% never played
0% unfinished
0% beaten
0% completed

But I guess I'll have to categorize them first so I'd see it more accurate

According to BLAEO, 68%. I'm on kind of a bottleneck though since I don't have many short games anymore.

32% as per BLAEO - beaten or completed.
1 or 2% higher, if we exclude some of the freebies and MP games that are in my library, like PoeticKatana mentioned.

From BLAEO:
773 games
32% never played
15% unfinished
4% beaten
48% completed

I am trying to focus more on unfinished games, but keep getting distracted with other games.

26% average game completion rate if i remember correctly. And i rarely ever use SAM either, so, that should be relatively true.