I've always been a PlayStation guy but had no current gen console, only my PC. I was happy with that, but when Forza Horizon 3 was going to come out, I was super hyped for it and was very excited to get it, despite not having played the previous two. I only had seen a YouTube streamer playing FH2 and having a super blast with it. I knew I could play FH3 on the PC, but I also wanted to playa FH2, and the other console game I had been hugely hyped about was Destiny, and so I thought hey it makes sense to get an Xbox. And then there's also Forza 6 and Rare Replay, which are excellent titles.
Backwards compatibility is also a nice bonus for me, as I coincidentally had around 15 or so 360 games still laying around, and only two of them aren't BC.
I bet on an ebay auction and snagged an Xbox with Kinect sensor (which I left in the box because wtf am I to do with that thing?), two original controllers, one charge pack, and six good games, that were also like new (The Division, Rainbow Six Siege, CoD Black Ops 3, Halo 5, Gears of War Ultimate and Battlefield 4) for 209. I mean at that price, what can you really do wrong? The games alone are worth more than what I paid.
I'm enjoying the console very much, and in the last two months I have spent much more time with it than my PC, I'm hooked on Forza 6 and Halo Master Chief Collection right now.
Get one, and if you don't feel you've gotten your money's worth, just sell it.