I used to play on Xbox 360. Personally I found my transition to PC rather smooth the main difficulty for me was using the keyboard and I still hit the wrong keys often. Aiming is easier overall and snipers are more prevalent. This bothered me for a while but not so much now.
What were your main problems when moving gaming platforms?
Well, seeing as I started PC gaming on a 286, it’s been a looooong time since I’ve owned a console (SNES at the time maybe?). Keyboard + mouse was the only issue I had, took awhile to figure it out. I still remember trying to play Doom on the Dwango network with a controller, and getting absolutely destroyed. That’s when I started to learn with a keyboard + mouse, and that was what, over 20 years ago? Hah.
I’ll never own a console again. Hate 'em.
I transitioned to PC fully around the Black Ops II release I think, I didn’t really have any trouble with the buttons but aiming with the mouse took a bit of getting used to, I don’t think it took very long for me though.
They make console games?
Lets see. I made my transition from console to PC gaming in 1995. I honestly don’t remember. I believe it was the graphics that sold me. As far as the actual transition, I don’t think it was too difficult.
I made my transition from xbox 360 to PC in early November 2015 and I’m never going back! It took me a month to get used to the keyboard but instantly loved the mouse and the accuracy.. Didn’t take too long for me 
Almost 134 already!
I never transitioned, PC for Life!
I still haven’t fully transitioned. I’m complete garbage on PC.