loganberries, tayberries & boysenberries

I'm not keen on loganberries - the hulls are too much and they seem to go mouldy before they ripen properly. Tayberries - I've grown several over the years, with the same result - 1 or 2 years of great abundance then a reversion to small acrop of small fruit. Never tried a boysenberry, but thinking of doing so. Any comments?