Hobbit...
Some of the main reasons:
Location: With the exception of Oxford, my nearest commutable full time school would probably be Cranfield, which is 50 minutes each way.
Cost: My planned living arrangements will be very low cost. Moving nearer to a full time course would incurr exorbitant living expenses in rent (for me anyway!)
Age / experience: To a degree this is a factor. I am not really a newbie to flying as I am a foreign licence holder about to convert (see profile) and have 1000+ hours. So being able to work at my own pace (i.e. move faster over some familiar topics and slower over others) will hopefully suit me.
That said, it would be nice in many respects to have classmates and not just stare at the wall instead!
Feel free to PM me if you would like more info.