Oxford has the largest Chemistry department in western Europe. In order to be able to bear the thought of four years of Chemistry, you have to enjoy three fairly different areas. Physical is interesting, but the others? Madness.
Speaking as an ex-Oxford chemist, I'm glad I jumped that ship. The subject at my old college has a horrific drop-out rate, with people switching to subjects as far removed from it as possible. The third and fourth years I know all seem sick of the subject, which is a shame. Why study something you don't love?