There are lots of great places. The problem is that none of us can afford them! I live in St Albans, but probably couldn't afford anything there is I had to buy now.
There are a variety good schools and a genuine sense of community. Restaurants, pubs and smattering of shops. Twice weekly market. Plenty of sports facilities and cultural things going on (Comedy festival this week, open air theatre at the Roman remains. some live music venues, independent cinema) Lots of parks and green space. Commute into London is very fast (37 mins direct train to London Bridge, more like 50 mins to Victoria)
On the downside the house prices are ruinous, train prices are high the traffic is pretty bad. I know some would say there is a bit of smugness to the place.
There are lots of other nice, commutable places in Hertfordshire too: Radlett, Harpenden, Markyate, Wheathampstead ,Berkhampsted, Tring, Welwyn, Knebworth, Hitchin, Brookmans Park, Hertford, Shenley, Sandridge, Letchworth, Kings Langley, Rickmansworth, Welwyn, Welwyn Garden City . I'd live in any one of them (but prefer St Albans for the easy commute and proximity to family)