Gloucester is one of the standard QXC desinations where I fly so me and loads of fellow club members went there when very inexperienced. Despite its size and how busy it is, Gloucester is friendly and easy to fly in and out of. It even has a NDB and DME to help find it (not to mention the M5 and the GCHQ building).
If you have time, there is a nice cafe near the terminal and fuel pumps. You cannot miss it, there is a Gloster Javelin mounted outside.