Hi Wilks,
I had radiotherapy back in 2007, combined with 3 years of HT, then again salvage HDR Brachytherapy in 2015 combined with 2 years HT.
My experience is that the tiredness associated with RT is short term and easily forgotten, however the consequences of HT are far more profound and long lasting.
My first spell of HT was 3 years on Zoladex, my last one was 2 years on Prostrap, and the side effects were the same with both, muscle loss, weakness, diminished hair, and of course impotence.
In both cases it took me a couple of years to get over it, and even now after 2 years (my last Prostrap was November 2015) I am still finding my erections are getting stronger month by month, which is another way of recognising that I have still not fully recovered.
I do find the summer sunshine cheers me up, no doubt boosting the vitamin levels, a healthy diet, plenty of exercise and a nap in the afternoon if you feel like are recommended.
:)
Dave