You would be wrong.
Here's a partial list from this week's queries:
- Vampire spelled Vampyre, Wompyre, Vompyre, or any other way (4 this week)
- Teenage boy/girl discovers s/he has developed a superpower upon hitting puberty; chaos ensues (7 this week)
- Teenage boy/girl discovers s/he is really an angel; chaos ensues (12 this week)
- Teenage boy/girl accidentally opens a portal through time; chaos ensues (4 this week)
- Teenage boy/girl accidentally opens a portal to another dimension/universe/planet; chaos ensues; dimension/universe/planet is saved (3 this week)
- Teenage boy/girl discovers s/he is gay; crushes on best same-sex friend; comes out to friends and family; chaos ensues; lessons learned by all and sundry (7 this week)
Edit to Add: Just to clarify - I'm certainly not saying that these kinds of stories won't sell, just that I am seeing a lot of the same trends. I just find it fascinating. By all means, keep sending it. It's how you tell the story that really matters.
Another trend I'm seeing that I neglected to mention above is the broody, angsty, lovelorn guardian angel, which is now running neck and neck with the broody, angsty, lovelorn vampire. Perhaps if the angels and vampires were, ya know, to get all broody and angsty and lovelorn with each other... (Susan, don't you even think about it. You have enough work to do.)