ETH and LTC is my fav coin also XRP still I hold since 3ksatoshi rate. Still hold on until now.
Ripple (XRP) is the best coin so far for me because it pumps very high from a 3 digit satoshi rate and i think there is a lot of people who already made a few thousands of dollars from just investing and holding their ripple coins. I also believe to ethereum and litecoin and i think litecoin will follow the price of ethereum because of its segwit activation.
They are good for long term, that is why we need to learn how to diversify our investment because it gives us the chance to still be profitable despite some coins are dropping. In overall most of the coins are profitable and even if you lose in some coins investment, there is a big chance that one coin will pump until 100 times and you could literally just let the others because you have made a profit from just one coin.