I'm sort of in the same boat as you, I'm 29 and will be moving from a four bed house that I've lived in alone for the past two years to either private halls or university halls, and neither option is massively appealing to me. I'd quite like to fastforward to second year where hopefully I know and can choose the people I'd be living with. In the private halls I've looked at there's studio apartment type accommodation, which seem pretty nice because there's ensuite bath + shower, and your own kitchen - but you're paying quite a premium - also probably a lot less social than uni halls, and from what I gather at least at the uni I'm choosing they try to have at least 2 people per flat or floor doing the same subject whereas private halls grouping is entirely random. Also, I think there's a higher proportion of international students in private halls, which isn't necessarily a bad thing, but it could suck if you're the only person on your floor who's a native English speaker.
But I think for me, realistically do I want to be living with a bunch of 18-19 year olds, and especially sharing a kitchen with them? Because I like to cook, and there's nothing more I hate than someone being in the kitchen when I'm trying to cook, having food no doubt vanishing from fridges, etc.
I'm still umming and ahhing about accommodation, but I won't know if I've met the requirements for my firm choice uni til july, so I've still got a while to decide.