It's a nice thought hand flying the entire sector but unfortunately in most airlines SOP just won't allow this. My last airline had an SOP to not disconnect the A/THR unless a procedure or impending 'excedence' required you to do so. In my current airline there is an SOP to say that the A/P must be engaged at all times above 10,000' and that below 10,000 manual hand flying should only be undertaken in 'good' weather and the could base must not be within 1,000' of the applicable minima. Having said that over half my approaches are generally visual approaches and all hand flown so I get plenty of practice.