Adding onto this, I didn't enjoy green tea until I started brewing it gong fu style with loose leaves. Teabags are acceptable for black tea but completely ruin green imo.
It's also worth noting that there's a noticable flavor and taste difference between different types of green (for example, I dislike the popular dragonwell, but love maofeng/mountain green tips). There's also a gulf of difference between Chinese and Japanese green teas, due to the processing. Usually Chinese tea is pan/wok/hot air fried, leading to a more nutty and complex profile, whereas Japanese greens tend to be steamed, leading to a more vegetal taste.
I also really like matcha, if you can afford the initial investment. It's definitely unique and can be an acquired taste. I really like the ippodo Sayaka/Horai, since it doesn't have a very strong umami taste, which can be off putting for people new to matcha.
Edit: and yes, there is actual science backing up your interpretation of green tea being less jittery. The L-theanine, an amino acid unique to green tea and a few mushroom varieties, has a balancing effect when paired with caffeine.
Even though they're not traditional shooters, the Ratchet and Clank games are really fun. There's a pretty big genre difference in the games in the franchise, with generally the earlier games being more platform-ey, especially 1 & 2. A lot of the humor from the original trilogy still holds up today.
There's definitely some "unfun" parts in the games (giant mech fight from rac2 and the hacker from rac3 come to mind) but overall cozy imo. Some of the most unique and fun guns in any game.
If you're looking for strictly more shooter, check out Ratchet Deadlocked. There's barely any platforming and no mini games that I can remember, it's pretty much all shooting. NG+ makes it super cozy. It's really nice to play emulated.