A is for Aliens. The first ones to visit Earth came many thousands of years before official First Contact was ever made.
B is for Boobs. Counsellor Troi had a smashing pair.
C is for Canada. Someone once mistook Will Riker as coming from there.
D is for Derriere. Deanna Troi's was quite lovely.
E is for Earth. The central homeworld of the Federation and a smashing place to get some Cajun food.
F is Fesarius, Flagship of the First Federation.