Cruiser said:one thing i can't do it tap my foot for rythm and play/sing. i've seen people do it, super ambidextrous they are
I have completely the opposite problem. I find it nigh on impossible not to have my foot doing the beat when playing and singing!
As for ambidextrous, the only reason I can do it is because rhythm is entirely instinctive to me. I'm often not even concious of the fact that my leg/foot is doing it!
At one stage it was useful as I was playing with a drummer who'd only been playing for 6 months and he had a habit of slowing down during songs. My foot tapping was visible enough for him to use as an external time reference.