I guess I feel like the odd little duck here, though perhaps it was just how I was trained - since I ASM'd for 5 years at the company I now PSM at (going on my 4th year).
I call Half, 15, 10, 5 and Places (2). For all shows with our symphony, I still call half at 30 minutes prior to the advertised curtain time (which is really 35), though I was taught to say "Half Hour til Top of Show" - meaning that I was never calling the time til places. Perhaps ballet is different...they need every call, and I even give those same calls to our pre-show warm up. I do tend to adjust to the proper call time after we pass the 15 minute call, so that I more properly align with the real top of show. Sounds odd but works every time - I have a symphony in the pit and dancers onstage by the time we get the house. I also walkie-talkie every call to my house managers, as they like to keep in sync for the bells. Yes, 30-15-10-5-and a Double Check at Places.
I carried that call time style into every company I work for (expect for the crazy adjustment per symphony contract). I took over calling a show once for another SM who had to leave, and when I shadowed her, she didn't call 10. I asked her about that and she said it wasn't necessary. When I took the show over, the actors requested that I give them a 10 minute call as well.
So I suppose it depends on the company, and perhaps even the actors. For the show I took over, it was a 2 man show - so I was happy to give them whatever they needed, call-wise. Though in my experience, I've only met that one SM in the last 9 years of my career that didn't call 10.