Thanks for the replies :)

It's good to know I'm not the only one. I have improved my lightness a little but it seems I'm still struggling to fret the strings by only the right amount, and no more, all the time. Relaxation is key I know but I suppose I'm bound to transfer some of my natural intensity (sounds terrible that doesn't it!) to my guitar.

I just don't want to wear out my hand muscles as you say Lisa and also lose that all important 'touch'.