As I understand it, you voted at the last election for the party, rather than for the candidate. So isn't that essentially what you are doing anyway? Yes, I know that this way you know who "your" MP is, but if it doesn't make a difference whether it's Joe Bloggs (Con) or Josephine McBlogginton III (Con), as long as what's in brackets doesn't change... would it not be better to have a system that at least more closely reflects that aspect of your vote?
In any case, there are halfway houses, between FPTP and full-blown PR, that still retain the link to an individual representative. This is perhaps a debate for a separate thread -- but all I am saying is that if you, personally, vote for a party rather than a person then FPTP isn't the system that best serves the way you vote. Unless I am missing something about what you were saying earlier.