To me, the nonstandard port is mostly nice for reducing log spam from scripts. The risk is that using a nonstandard port lulls one into a false sense of security and overlook good sshd practices. Good sshd practices will prevent the script-kiddies just as well as the non-standard port, while a non-standard port will not challenge a targeted attack. And, if you interact with multiple servers, it can be inconvenient to remember a different port for each one.