I'm doing a bit of hour building from Exeter whilst I start my ATPL ground studies (I've chosen Bristol funnily enough). The atmosphere at Exeter is good with plenty of people to talk to and the flying in that part of the world is great. It's a nice change from the congested south east where I did my PPL. Although I'm at the early stages of it all I can ask the instructors many questions on the ATPL theory and the CPL course and they've always been happy to answer.
Although you're in Bristol there is a bus from Exeter St David's station to the airport, not too expensive either - about £2.90 return if memory serves me right.