I think you should take a few things into consideration.
1. How technically challenging is the show?
Do you have a lot of scene changes and fly cues where you would need to know if something was
clear in the wings before calling the go for the next
cue?
if you do have some large complicated changes, I would suggest calling it from backstage if there's room for you. This simply cuts down on the timing if YOU can see when things are safe to move, especially if you have a crew backstage who are inexperienced or have their hands busy pushing scenery...it's difficult sometimes for them to get a chance, or to remember, to let you know they're
clear.
2. Where you are most comfortable is also a factor. If you haven't called a show before, and you have at least one camera with a full view of the
stage from
FOH, go with backstage. Even if you don't have a full view from backstage, you can give standbys to your board ops for visual cues and let them take it.
I've done it both ways. When I first began
stage managing in my first few years of college, I called from the spot booth in the balcony. The audiance was never up there and we didn't have spotlights, so it worked out nicely. However it was still difficult to stay quiet because of the
acoustics in the
house. I did that because that is what the
stage managers before me had been doing. After the first big musical I called from up there, I moved to calling from backstage. We got some cameras and though the
image was horribly washed out when the lights were on, I didn't need to see the
stage anyways. I knew the show and followed the script, called the cues from the
book, didn't need to watch it. The board ops took visuals with my standbys and I could see most of it from my position SR most of the time just in case. Being backstage helped incredibly with the scene changes and cut down the delays big time.
So, ultimately it's up to you. Where are you going to be most comfortable? But also keep in mind the technical aspects of the show, and
call from where it will make you more effeciant in doing your job.