Simple really. What's your favourite town/village/area in Sussex? Why do you like it and what is there to do there?
Shoreham. I was born there, and despite living in Portslade, I spent a lot of time in Shoreham whilst a teenager.
Later, my son was also born in Southlands.
I love the river, the beach, the downs and general atmosphere of the place. It's a shame it was slightly too expensive to buy anywhere, when returning to Sussex.
Er, Brighton obviously...