I think it just depends on your recipe, can you post what kind of hops you used in the boil? Depends what you want your aroma to be like. Floral, citrusy, piney, earthy etc. Simcoe is a great dry hop. You could use the same hops that you used at the end of the boil, within the last 10min, since you'll already get some aroma from those hops anyway, might as well amplify them.
Fermenting/Conditioning: Casc/Cent APA, Hoppy Birthday Amarillo/Simcoe IPA(6g American/5g Belgian), Chappist Belgian Dubbel
Bottled/Kegged: Red Rye IPA, Wesside Trip(Westmalle Tripel clone), ESB, Lil Trap (4% Trappist Starter Batch), Robust (Pumpkin) Porter, 3% Little Hopper, "Slick Rick" Old Engine Oil Clone(oaked w/ vanilla and balvenie scotch), Imperial RyePA,
On Deck: Quad, Belgian IPA, Orfy's Mild, Scotch Ale