Roger Rassool's lectures can be very entertaining, thanks to his jokes and exuberant demonstrations - although after people get accustomed to his behaviour, they get irritated by his lack of actual teaching.
Physics demonstrators are very laid back - they pretty much only look at the conclusion when you show them your lab report - and the pracs are easy to get 10/10 in. DO do the pre-labs, and do have a read of the lab book beforehand. Helps you get out faster.
Tutes - generally you get given a problem sheet with questions covering the previous week's material. If you're unlucky you'll get the old, patronising tutor who spends the entire lecture going through problems on the whiteboard at snails pace and glares at anyone who talks or moves - but most tutes are pretty chilled.