Manga
I've been reading Full Metal Panic: Sigma, while watching The Second Raid alongside it. It's interesting, considering it has some differences from the anime. Some for good, others for worse. I prefer the Anime, but the Manga is good too.
The other two manga I've been following, The Lies of Sheriff Evans: Dead or Love and Shibuya Near Family are both still fun.
Anime:
I've recently watched Gundam 00 - I wrote more about that here.
Tokimeki Tonight is still a fun show when it comes to the wacky comedy and artsy backgrounds.
Ranma 1/2 (1989) - Rumiko Takahashi's writing is consistently entertaining, and over a dozen episodes in, it keeps delivering. Will the show be able to keep up? I hope so!
Another entertaining show is You're Under Arrest!. Is it copaganda? Yes. Has a certain aspect of the show aged poorly? Also yes. What the show excels in, are the villains of the week. Strike Man will be living in my head rent free for a bit, I suppose.
Dragon Ball Z is peak, over 60 episodes in.
**Western Animation & Live Action **
I'm still watching Gravity Falls, and it's good, if formulaic. Apparently people dislike Mabel and like Dipper? Because so far it's the exact opposite for me lol.
Also, I started Andor. I like it so far, but it's clearly still cooking at this stage.
Agree with you for the most part on Gridman. I liked the cast a lot more in SSSS Gridman, not entirely sure why. The movie worked more for me, but I think I'm a bit more forgiving for mid when it's a movie or short OVA.
Didn't realize the film versions of Thunderbolt were more complete, but that's not too surprising. I plan on reading the comic eventually, so I'll probably watch them after that. S1/December Sky is definitely stronger IMO.