Thanks for all the replies everyone - this is really helpful.
The comments from Gladys and exexpat back up what I've already gleaned from my interweb researches - traffic / transport and schools seem to be top of the pile when people list Bristol's negative points.
I don't drive so I'd be interested to know more about why Bristol's public transport system is considered to be so crap. I've been looking at timetables and ticket prices (
yes I know it's trainspottery) for both Bristol and Brighton, and they seem pretty comparable pricewise and in terms of frequency of services from the 'burbs into the centre. Are Bristol's buses just unreliable or something?
passionsrunhigh - you're right, there's nowhere with as many "layers" as London and wherever we move there will always be things I miss about living in a capital city, but I'm resigned to that. Good idea to think about priorities - my 'Pros' and 'Cons' lists could do with some sort of filter.
Westcountrywife - know what you mean about about the seedier side of Brighton and not just the drugs / dealing - I've been intimidated in the past by street-drinkers who seem to be allowed to congregate in rather large numbers in certain parts of Brighton. But maybe this is more of a city centre problem as you suggest?
Re considering Bath / outlying villages - Bath might be an option, but I suspect living in a proper village (as opposed to an "urban village" like, say, Clifton) would be too much of a culture shock coming straight from London. Also, I should think transport would almost certainly be an issue in the sticks.
WetAugust - re shopping, I'm not a massive shopper but I am slightly swayed by the fact that Bristol has both a John Lewis and an IKEA
- Brighton has neither (as far as I can make out the biggest dept store is Debenhams, which is a bit meh in my book).
exexpat - thanks for your post, that's all really good to know, especially on the getting around / transport front. The "big-city" stuff is what's giving Bristol the edge over Brighton for me so far. I know Brighton has the Festival (which is great) but there seems to be a lot more going on in Bristol culture-wise.
On schools - we've no DC yet (just started ttc) and I don't want to count my chickens, but lack of primary places seems to be a big issue in both Bristol and Brighton (more over Hove way I think). A midwife friend told me there was a "baby bulge" nationally in 2006-7 and a lot of local authorities are having problems accommodating the extra numbers of children who are now coming through into reception.
Brighton apparently has some sort of lottery system for the better secondary schools, but as DCs are still a twinkle in my eye at this stage I haven't done much research into secondaries as it feels a bit previous iykwim!
Lots to think about - thanks again everyone for responding. Any further info on why Bristol's public transport is rubbish would be much appreciated.