Drugs, alcohol, and now coffee! I’ve used a variety of substances to self medicate while in a depressed mood. A few years ago I cut out cannabis, and I stay away from using alcohol when I’m down, but I have no limits with coffee. It seems like I can drink as much as I want whenever I want and it doesn’t create the same problems it does when my mood is better.
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.