Capuccino & Latte's here, double-shots though otherwise they are too weak. I'm a fan of white chocolate and vanilla personally, though that is simply because I abuse my machine to death on a daily basis.
Why pay $4.00 for one that someone else made when you can make one 10x better and as strong or weak as you want with any flavoring

.
Straight coffee is about nasty though unless it is certain types (snickerdoodle is pretty good straight without anything).