Gatebil is pretty mad, as is SEMA TBF but Goodwood is the best in the UK. Sadly as per others I just find it too crowded these days, I wouldnt go unless I had hospitality tickets and even then Id probably only do Thursday and Friday, maybe Sat morning. Have fun though, first time I went was the week after Id watched Aston win GT1 at Le Mans and I got to meet a couple of the drivers and have a good chat, also had a really nice chat about the GT4 350Z with the guy who runs RJN, you arent going to get that at JAE