Caffeine affects me very strongly, but it doesn’t make me feel alert, focused, or anything like that. I don’t feel it at all — no boost whatsoever. The problem is that I just stop sleeping. Not just a little — I mean, chronically. Even when the caffeine should be out of my system, I still can’t sleep. There’s nothing good about this, only downsides. That’s why I try to avoid caffeine, though I still end up consuming more than I should. It’s been a dependency since childhood.