[stpe]

I'm very much the same. And I do envy people who gets into some kind of hyper productive mode after a coffee, or like my partner who can't sleep at night if she gets a cup after 2pm.

I can have a large cup of coffee at 10pm, become tired and be sleeping at 11pm. Also, during extended vacations (>2 weeks) I typically go without coffee and, what I can tell, don't feel the difference.

I wonder why this is case...?

[heavenlyblue]

I can have a cup at 16:00 and then have a problem sleeping at night. It does not make me hyper or active though - just keeps my anxiety levels higher so I can't fall asleep.

YMMV.