Yes, the 5DMK II Bad Habits, great Camera, loved it, but that Focus System for me led to some bad habits, Centre Point Focus then recompose being the biggest bad habit, but the Centre Point is the only point worth using, so you work with what you have.
The 5DMK III & 1Dx with the 61 Point system, allows me to dispense with the Bad Habit of recompose, for those that recompose works for, more power to you, really, but I've simply found recompose when ever it's used invariably deals slight out of focus into the Image.
Like others in previous Posts, I use a single point Focus then move the Point in the frame to match the area I want to Focus on, generally on Single Point spot for static objects, single shot. Then for anything else AI Servo it's mostly single Point & set for 61 point so once I lock on I have a reasonable chance that the system will track, I tweek the release/tracking/focus priority settings dependent on what the situation needs.
I still shoot the 5DMK II on single point & recompose as I converted one of my 5DMK II's to Infra Red Sensor, so the Bad Habits do persist.