Wycombe being rude is harsh, if you are aware of and follow the joining/departure procedures it's a very welcoming place. Most "rudeness" is as a result of someone barging their way through the gliders/flying low level over the (extremely) noise sensitive locations/not following the helicopter circuit.
Get a good brief and avoid any grief!
Ed at the Crew Room cafe at Denham might disagree about not having a cafe at the airfield, north side beside the pilot centre, good grub and a very pleasant spot for a coffee watching the world go by. The Pad cafe at Wycombe is also a good location for watching the gliders, fixed wing, helicopters and various vintage aircraft depending on what's going on on any given day.
Second White Waltham, Goodwood, Caernarfon and Shoreham, throw in Sywell and Wellesbourne, Manston for a random one out east!
As for Ireland, Enniskillen for sure, Newcastle is a great little place just to the south of Dublin.