Southampton is a working port, so expect seagulls but dont expect a beach. There's plenty of parks and lots of greenery. It's not a big city like Birmingham or London, but there's plenty of shops and nightclubs to suit everyone. The union has recently been done up, we now have our own nightclub, three different bars and hopefully a pool and cinema by december! There isn't too much concrete around and the facilities are good on campus (shop, travel centre, hairdressers, banks and waterstones).
Most of the halls are nearby or at least on a decent busroute. My halls (Monte II) were wonderful, I lived with twenty girls, some of whom I still live with and I'm still good buddies with nearly all of them. We had an excellently cheap bar, a wonderful burgervan and a vending machine that we could run to in the Hollyoaks adverts! There were also loads of washing machines. It was easy to find accomodation in second and third year (£48/week)as long as you are in groups of 5/6/7 etc.
My course is very interesting and also pretty rare (anyone else heard of an undergraduate masters!?). We go out on boats, and spend time in labs, lectures are only two or three times a day, four times a week. There's plenty of work to do but overall it's pretty slack.
I have time to work part time in a nightclub and learn to dive. I hope to be a scuba instructer soon, this is through the uni club who are wicked.
Hope this lures you to Southampton!