Thanks for the replies. Well I'm currently mining on MPH where I auto-exchange to either BTC or LTC since I'm GPU mining, and HODL ETH and ZEC when they're the most profitable coins to mine (according to MPH Coin Mining Profit Switching). I understand what your saying @fanatic26, when I first started out I was mining ZEC only on Suprnova.cc and it seemed more consistent between transactions, i.e. no time waiting for auto-exchange to go through. Although I do like being able to be paid in coins I can't necessarily mine with my current rigs (algo's like SHA-256 / scrypt etc).