Heh, similarly I haven't done much with the OTA programming because I keep my ESPs on an isolated WiFi network and it's a pain in the arse to access them directly from my workstation.
Ah, you're missing out, I love OTA. Very fast, and you don't need to move the ESP at all (if it's on the same network, anyway :P). Plus, you can keep the serial line open for debugging while flashing.