you always use the male on the input (battery) wires, and always use female connector on the out put (motor) wires. this is so that 1. you dont plug the battery into the wrong wires and toast your esc, and 2. you dont short out the motor wires on something metal if you have the motor disconected.
i enjoyed using deans (on the motor) in my buggy, but after a rough landing or a bump, the connectors can come apart. if you use deans, use electrical tape to keep them together!
i just solder my wires on directly.
my .02 cents! cheers!