[Shaun]

My favourite usually changes about 3 times over the series. For the first week or two I form first impressions, but then that changes dramatically (with a late arrival / my favourite going first)...

then near the end there may be a twist, and other favourites might go, so on the whole I probably choose 3 favourites.

Then again, I might get lucky and have 1 favourite the whole series (Nadia, Richard, Amy etc.)