I moved to Wales from Hertfordshire over 15 years ago after visiting another Hertfordshire ex-pat here for a weekend.
He told me 3 things:
1 - There's no work .... I had an interview on the Friday after I moved down and started work the following Monday. Never been out of work since *Touch Wood*
2 - "They" don't like the English .... I've had great banter, fantastic days out at the rugby and I have married a Welsh girl so at least ONE of them liked the English!
3 - It always rains .... well one out of three ain't bad I guess
I've lived in the Valleys, in Cardiff (the bay) and now in rural Monmouthshire and it is fantastic, Cardiff Uni is great too, I can assure you that you will love your time here in Wales
ATB
Dave