I'm kind of thinking of stopping, only because it bothers me if I go on a trip or something and have to get caffeine to avoid headaches. Also, part of me wonders how caffeine is influencing me overall, if it's doing things I'm not aware of.
To be honest, the reason why I'm reluctant to try it is because I tea and coffee occupy this place that I can't quite find a replacement for, which is something interesting, low-calorie, and not a depressant. By "interesting" I might mean "artisanal" or "varietal", but I'm not even sure I mean anything that specific: I just mean, there's interesting variety, differences in products to try. Coffee and/or tea also are pretty low calorie if taken black (like I do), and unlike things like wine or beer, which are also artisanal in nature, don't act as depressants per se.
If there was something like coffee or tea, with lots of variety and skill involved, that kept me from consuming calories from other sources, and didn't have any kind of psychopharmacological effects, I could go to that. But I am not aware of anything like that.
Maybe I just need to rethink my perspective on it and what I could do to address those issues in other ways, but there are a lot of benefits to caffeinated beverages aside from the caffeine.