I came pretty close to getting platinum on Stellar Blade but I avoided it
You deliberately sidestepped it?! Duuude! You could've had yourself plat for that!
I read your post about the game in the thread you linked to before. Really pleased you had an enjoyable time with it. Based on what I've seen, the visuals look absolutely outstanding.
I love a good challenge but I am certainly no completionist, those ones you set yourself sound crazy to me!
Eh, I first played the original Super Mario Bros. way back in 1991, so I know it so well by this point that doing it on one life really isn't too difficult. The arcade Super Mario Bros. (called Vs. Super Mario Bros.) was a tougher one, though, because after I finished the game on one credit I changed all the settings to their most difficult and tried that as another challenge: only two lives at the start instead of three, 250 coins needed for an extra life instead of 100, and less time given to complete each level. Just like with my regular Super Mario Bros. challenge, I barred myself from using any level skips, so I had to play all 32 stages. Yeah, that took a few goes to get right.
The 20 or so hours spent on that New Super Mario Bros. U Deluxe challenge level was by far the most difficult thing I've ever taken on in gaming, though. The level itself is only about 90 seconds long, so I must've made somewhere around a thousand attempts at it. Yikes.
It's honestly healthier
not to be a completionist, to be honest. I played Yoshi's Crafted World to 100% earlier this year, even though it's honestly a pretty middling game. That had a really difficult boss fight at the end of the post-game. I took far too long to get the patterns down, so I was stuck on that for around six hours in total. Help.
TLDR: You're going about your gaming in the right way, I reckon.