STV retains the one kind of member of Parliament. It means at the local level there are multi-party MPs to represent the distribution of political preferences in the neighbourhoods. So it's not just the plurality, there is not just the political preference that more people like than any other single preference.
In my part of Toronto we have lots on the left, we have lots on the right, we have lots of Greens, and I like the idea of a number of MPs representing districts of Toronto rather than single ridings with only one MP. I like that idea very much.