Hey I'm a southerner at Sheffield uni...there are loads of us! Really don't let the accent thing deter you - like all uni's there are people here from all over the world with all kinds of accents, American, Chinese, Australian to name but a few. As for Sheffield vs Sussex, they are both good uni's. Sussex is a campus uni isn't it? Sheffield Uni is in the centre of the city, so defferent university experience. If I was you I'd look into whether you would rather have a city or campus uni than the accent!