i prefer AMEX for long term and position trades. Most 10 baggers are from AMEX
day trading small blocks on NAS and large blocks on NY. reason:
at least it seems my broker does not place my large block on level 2 on NAS, sometimes, they won't even trade my shares so they route my orders differently based on size. NY is fine as long as there are enough volume. for little volume stocks, NY, AMEX will kill any day trader's profit.