If I have a new altcoins, the best exchange to start off with would definitely be any of these large exchanges, because that is the only place where I can get the volume required to push my project up. Larger exchanges have very high traffic to get any altcoins successful, their only disadvantage is just the cost of listing which makes it quite too expensive for startup projects.

Exchanges like Binance, Kucoin, Bittrex will really be very effective for altcoins to get very high volume, but even at that, the project must still do all its possible best too to create the hype necessary for it so that people can get the awareness of the coin. When the awareness is first created, what will then encourage people to take step as regards investment in such project is the type of exchange they are listed on.