I've flown both the Auster and Cub, and enjoyed them both a lot - but you can't deny that sitting back in a comfortable seat, in a relatively low noise and vibration environment, with a really good view all around you, and minimal controls and instruments to think about,whilst you pick which bit of the british countryside you fancy seeing from the air today - it does have a certain appeal.
I think for me it would wear thin very quickly. A bit like being at work. I prefer my leisure flying to be all about being 'connected' to the aircraft and the old noisy, smelly, challenging to fly types are the ones that float my boat!!