And when others i still know in college there get ready to stage manage one of the dance shows I'm always like "take mostly everything you know about stage managing a play, and push it aside. Don't think you know what to do cause you did a couple plays.
Hmmmm...I have to disagree with this. My training in straight theatre prepared me immensely for the job I have now -- granted, I had done ASM work with the ballet company so I knew the workings of a dance company and how to work with IA crew, what dancers are like, etc., but my work in theatre allowed me to bring some different to the job that my directors really appreciate. For example, I make it a point to attend every rehearsal (or at least as much as I can - the nature of my job makes it so that sometimes I have to do school shows while the choreographer is rehearsing the professionals). I do the same sort of thing I do for a play or musical during rehearsal and then some. I run music for the choreographer and note the points at which he stops and follow along with the score to help him count things out. I don't notate all the choreography, but I do write down specific things so when the choreographer is grappling for a good place to take it from I can jump in with "how about from the jetes?" Last season when he and I had gone out after a rehearsal he told me how extremely helpful it was that I sit in rehearsal and that he's never had a stage manager do that before -- it's just not the norm in the dance world. Sometimes there's a ballet master or mistress who will do this, but they are more there to learn the choreography so they can rehearse the corps later. If I hadn't done all sorts of work in different kinds of straight theatre, I would not have had this kind of background and knowledge and wouldn't have dreamed of going to rehearsals I wasn't expected in, hence probably wouldn't be in the position I'm in now.
Likewise, my work with the ballet company has only made me a better stage manager for theatre. When actors/directors say something like, "wow, that's a really cool idea" to something that I have picked up in the dance world, I know where I can chalk it up to.
Yes, a ballet or dance concert is different in many ways from a play or a musical -- but in the skills you learn doing each will only help you in the other.