Great writeup!
I also prefer to follow people's online feeling. Buy when they've panicked a bit, sell when it's well above all time high and everybody's screaming about Lamborghinis.
Which are your favourite exchanges for alts? I prefer to just trade on bitshares, but many of the ones you mention can't be found there.
I trust Binance the most. You can use my referal link if you like:
https://www.binance.com/?ref=10196770
Kucoin.com is not bad either.