Do you prefer to attend resident Military courses or distance learning Military courses if available?

Resident. Do you remember the old correspondance course shenanigans when multiple people took the same paperback classes and shared answers? All we need is more computer saavy cheaters and hackers being promoted faster than they should be. I have become very suspicious and untrusting in my old age.

Resident, you can network, and you can ask instructors real time for clarifications.

Yes CW4 (Join to see) resident training is much better for all involved than correspondence training especially when the training and curriculum involves different branches and/or military services. I went through Resident training for basic and advanced infantry and was able to work with officers from many nations in the process - we even heard a "discussion" between at Egyptian LTC and an Israeli LTC who fought on opposing sides during the 1973 Arab-Israeli war.
Even if you are in the Reserves, resident including regional training team provided courses is the way to go. I went through U.S. Army Command and General staff School (CGSC) which is a multi-discipline and branch course with members of many different branches. We were able to cross-pollinate and those of us who were combat arms were able to train the doctors, lawyers and others [no Indian chiefs though :-)] without tactical or operational experience on what we had learned through training and experience.
Another benefit to resident training is that students can help train the trainers by sharing their experience in operations and with equipment or materiel with the class and the trainers.