I started on PS4, then Xbox and now PC. I've got 12 different characters across the 3 platforms, although I'm sure I'll fill my PC slots before long and have 15 in total.
This season has been rubbish compared to previous ones and is the first time I've not tried to get to level 150 on all formats to buy the extra atoms from the last page of the season items. Not that it wouldn't have been a good time to do it, given that I would have more atoms from not buying the junk they were offering.
It's a real commitment doing the dailies and weeklies across 3 platforms. I think I might quit the consoles at some point as online play is free on PC and costs too much on consoles.
So what about you? Do you just play on one format and how many players do you have?