I can honestly say coffee is a huge part of my decision making when I travel.
My friend was in Indonesia and brought me back two bags of Java... espresso (NOT expresso, okay) grind... last year when I was in Cuba the stuff I bought for 10 cents a packet was some of the best coffee I've ever had (still have some in my freezer)...
Greece - you don't necessarily go there for the coffee since most of what they drink is INSTANT. They DO have frappe though, which in my opinion is a great coffee shake considering it's made with instant coffee. Otherwise they use the Turkish method of leaving the grinds in the bottom which is fine by me... makes for strong coffee which I always appreciate.
This year's decision to go to Costa Rica formed back about 6 years ago when I realized how much I love Costa Rican coffee. When I went down it was the first thing I went for... I brought back a couple of bags... one for me and one for another Triber.
It's my medicine.
And yes, Tim Horton's coffee is definitely substandard.
i'm particularly keen on americanos. it's just watered down espresso, but it ends being like something between an espresso and a coffee. (same great taste, but lasts longer).
but i don't have anything against timmies either. (the only problem there is i like my coffee black, and i keep accidentally ordering 'regular coffee'... blech.
coffee makes me positively peppy on an otherwise unbearable morning. i gave it up for a couple of months when i realized i was probably addicted, but then decided it was an addiction i'm happy to live with.