I'm of the opinion that the best abbreviations are the shortest ones that can still be universally understood, so i tend to settle for "X1". XO is a potential alternative, but it reminds me too much of 'hugs and kisses'. I seem to randomly switch to XB1 on occasion, but i have no idea why. It's not really a topic i bother internally debating when typing :p
People's stance against "xbone" has always confused me though. I don't personally use it because it's too long (though it's a perfectly logical abbreviation), but the idea that my opinions could be entirely invalidated by me using it rather than "X1" or "XB1" just strikes me as a bit silly.








