Hey Amber, its very difficult to say what really works, I've seen some pics clearly only done with a phone-camera with poor light that actually worked for me (just some intangible quality) but in general terms I guess the slightly more professional shots will catch my eye (pref without any air-brushing or photoshop: lads YE DON'T NEED IT!!)
A particular pose I like is a girl to be fully naked lying tummy down on a nice big bed (white bed sheets) she facing the camera so we have cleavage and the cleft of her bum visible, and a nice pretty smile too. Pardon me now Amber I am picturing you in just such a pose and its making my willy feel a bit funny....