I'm an adult Lego-ist who recently bought his first flat in London and has since become reaquainted with my Lego after it all being kept in a chest of drawers for 15 years at my mum's.
Technic cars are my main forte. As a car nut with no money and no need for a car in London, large technic creations are an outlet. I'm a bit out of practise and I'm not convinced by new Lego (far too specialised and uncustomisable) but I'm getting the knack again.
This website is an amazing resource of passion, ideas and invention. There are some amazing creations out there: Nick Barrett's massive Citroen DS for one. I like the friendly community feel too.