We just moved from Edinburgh to Glasgow. DH is the american and he actually prefers Glasgow, mainly because of the people. EVERY time we've been out - including the supermarket - we've been involved in some kind of extended conversation with people, all good. They are passionate about their city and very welcoming.
In saying that, there are rough (very rough) pockets of Glasgow so you really need to be careful about the area.
The weather - if it matters - can be a bit of a pain. Before I moved, I had the same umberella for 5 years. Since moving I'm now on my 6th (it can get very windy here).
Glasgow is also very green, loads of parks, recreational areas, golf courses. Something which surprised me to be honest.
I lived in Glasgow nearly 20 years ago too and had a brilliant social life, the nightlife is superb. Being a bit older this time round, I'm appreciating things like great shopping, plenty of restaurants, good public transport and roads (much easier to get around this city than Edinburgh).
I don't have children, so don't really have any advice in that area.
Stirling as a recommendation is great, but there's also really pretty villages and towns around the outskirts of Glasgow. We're in Bishopbriggs (strictly speaking outside glasgow but only a 10 minute drive to the city centre) which is lovely. Kirkintilloch, Lenzie and Torrance are all close by and seem nice (though I've only ever passed through or stopped for petrol).
It really is worth a visit to explore areas in and around Glasgow. But as an Edinburgh girl I am sold on Glasgow which is quite a feat!
Good luck with your decision.