[myrmidon]

Which one you prefer is just a matter of taste.

But also, you can stay sufficiently hydrated by drinking just tea. Trying that with coffee will skyrocket your caffeine intake to unhealthy levels.

[cubefox]

Also, caffeine is addictive. As someone who is severely addicted to caffeine, I really recommend not getting addicted. Try to drink tea without caffeine, even if you "don't mind" the caffeine in black/green/white tea.