I live in Saltdean and really like it, but it's very sleepy suburb of you want to be in the thick of it. As a Londoner who had lived all over, included zones 5&6, I think a 20 minute bus ride to the town centre is pretty good, but proper Brighton folk think we're very parochial!
Good points: you get a lot for your money, the primary school is very good and has a wide catchment, we're wedged between the sea and the downs and 5 minutes to both, we're on a hill so there's good views from virtually every house, there's a really friendly community feel and I've made friends very easily, the lido should reopen next year
Bad points: the aforementioned quietness, the local secondary schools aren't great, the nearest station is Brighton so it's not good if you need to commute back to London, the housing stock tends to be 60s bungalows rather than nice period housing - they're very practical to live in and have good development opportunity but they're not pretty, the downs cut us off slightly and the few roads that go over the downs can be clogged, there's no decent pub (although the cafe on the beach is fabulous and serves beer and wine).
Rotting dean is closer to Brighton, prettier, had some nice pubs and period houses, but is more expensive.
If I'd has the budget at the time I probably would have gone to Hove, but if won the lottery tomorrow I'd stay here - I'm really settled and happy.