Ain't knocking coffee (nor Captain Morgan, mmm), it got me through two college diplomas
And "on occasion" is a bit of an understatement for the last few weeks of my SH4 playing.
Still not going back to it though, it's just tea for me now.
There's also different kinds of green tea. I'm not a fan of some of the sharper, 'browner' Chinese/Vietnamese varieties. But I do like the 'greener' and milder stuff, like various Japanese Sencha types.