Hi, BigSister.
One site where there have been a lot of discussion articles about Reality TV is
http://media.guardian.co.uk - type 'Reality TV' into the search box to find them.
Some of the articles are very against reality TV-type programmes, but others give quite balanced views about why people watch and love them. We've discussed quite a few of these articles on this forum!
Good luck with your talk - we're all Reality TV fans on this forum (especially Big Brother!!!), or else why on earth would we be here!