I moved from Brighton to near Durham and would like to move to Newcastle soon as I work just outside of it. I think it's a fantanstic city! The metro is pretty decent in my opinion but i've only used it a handful of times and there are tones and tones of of amazing sights and things to do when you aren't at work in the city and further affield too.
Where exactly in Newcastle are you moving to? As it will give people a better chance of letting you know what the transport links are like. Entertainment wise these is the Gate in Newcastle with all your generic places to eat like nando's/pizza hut etc and has a cinema and just down the road in Gateshead is the Metro Centre whichi is a massive shopping mall with loads of places to eat as well as a really nice Odeon cinema.