[@floodtalon]
Just out of my own personal taste I'm not a fan of genderswaps, but it's not my character. I would suggest really weighing how much it ties in to their desire to become "a different person," though--what was "gender" to them? Did they suffer for not meeting some standard of manliness or not being feminine enough? Did they have real and legitimate issues tied to their biological sex, medical or otherwise? And if their actions and personality don't change, would changing their gender really achieve anything? Although you could, if so inclined, try to answer these questions in the future rather than the present--maybe their story is about finding out what these answers are to them.

Again this may just be personal taste, but I'm not fond of characters who place too much weight on their gender as part of their "identity." A character who says "I am a civil engineer who listens to smooth jazz and rides a Harley" has an identity formed from active, observable skills, tastes, and preferences. Someone who says "I'm (insert random letter of sexuality/gender/political spectrum or an abstract adjective like intelligent, creative, etc)," isn't telling me something I can see about them in most cases, therefore I have only their own perceptions of themselves to go on--and if someone has to [i]tell[/i] you how much of something they are, instead of just showing you, then it's just an informed trait they may or may not actually demonstrate.

[@Gardevoiran]
Whatever the Monster is, that's pretty much set in stone. You could change certain features if you wanted--colors, styles of fur, distinctive shape of the eyes, etc.--but they are specific creatures rather than categories. You will, however, be able to change into many different species of monsters over the course of the RP--transforming and evolving is one of the primary goals.