I've always had Shimano so I just stick to what I know. Considered trying out sram as I always seem to have some kind of gearing issue, but can't be bothered to spend all that money switching only to find out it's the same or worse.
Same. Shimano on first MTB, so just continued using it as it never let me down. Since gone > Road > CX, and same still applies.
I did have a Boardman CX briefly which had SRAM Apex. Lovely shifting action, doubletap was nice....the front mech was a bollix, and lack of trim got me surprisingly annoyed.