Ritalin was a game changer. After the initial adjustment it just feels like it brings me up to normal, I'm not particularly stimulated (in fact my lack of wandering mind makes it easier to doze during the day), I just prefer coding to games etc. It feels like it unlocks access to natural reward mechanisms instead of chasing artificial feel-good rewards. I can't even listen to a YouTube video while coding when using it, which was a normal activity for me since my brain felt bored and went off on its own without it.
Just mentioning because curiously it almost entirely put me off caffeine. I still enjoy my morning coffee as a ritual, but sometimes don't finish it. If I have another then the side effects are severe, Ritalin massively boosts those - nerves, jitters, hitting the toilet. Not terrible or dangerous, but just interesting, and honestly caffeine never did a whole lot for me mentally so it's no big loss.
Take this with a grain of salt, but I use it as an ad-hoc benchmark: FDA recommended maximum daily limit on caffeine is 400mg. If you're regularly going above that, then (politely) consider whether you should be.
I've been a heavy coffee drinker since i was a teenager.
I'm sitting at 13 double espressos today which is about average.
Lately the instant sleepiness post coffee isn't worth the focus, and I'm starting the think medication would be a healthier choice