Like Hozer said, DOR is a request to drop out of a training program. Unlike OCS, a DOR does not remove you from the military entirely.
A redes board may decide to boot failures in "initial officer training" programs (flight school and nuke school). That usually happens when the usual destination communities for DOR's (SWO) are either overmanned or are in a "We're not taking out the aviators' trash" mood. In that case, it's an Honorable discharge "for the convenience of the Government".
Anything besides Honorable is a big fucking deal, and is never done except in cases of misconduct. OTH doesn't sound all that bad, but it is.
So, repercussions of DOR'ing? You'll either be a SWO or looking for work in a shit economy. Me, I'd sooner make lattes at Starbucks and live in my parents' basement than be a SWO again. That was also good motivation to study my ass off in the VT's.