Just wondering from anyone's personal experience, positive or negative which uni i should or shouldn't go to for medicine?
UK medical schools are all GMC accredited and allow you to obtain a primary medical qualification which will give you provisional registration to practice as a doctor. There's no such thing as a "bad" medical school.
As for which one you'll have a good time at, that depends on you as a person. Do you want to live in a city or in the country? PBL or lectures? Is early clinical contact important to you? Do you want your course to include a mandatory intercalated degree?