Oh lego is awesome.
When I went off to university I took my (very heavy) lego trunk with me on the train, without checked baggage. This was not something I was going to leave behind! I bought mindstorms not long after they first came out. I never liked following the directions or building what the sets told me to, always marching to my own drumbeat. And as with my cooking, I liked to build the same things over and over again with only modest changes.
My favourite things to build were oil tankers (with double-hulled tanks), heavy bombers (with bomb bays that opened and dropped marbles), and massive chinook-type helicopters, all from the 5-segment pirate ship base of which, annoyingly, I only had one. It was a mission of mine to build a ship from that base that would actually float, and as a young kid I put a lot of effort into building a box of not overly buoyant lego to attach to the underside to keep the ships afloat in the bathtub at the proper waterline -- though I lacked any kind of pump and so floundering was ultimately inevitable. My solution was to place the ships in the snow where they at least appeared afloat.
I also loved building small aircraft with the purpose of destroying them. Throwing a helicopter up in the air and lobbing a well-aimed AA battery (appropriate enough, if you think about it) was an occupation that could keep me entertained for hours, rebuilding, launching, and shooting down the same little chopper over and over.
Now as my twenties approach their final months my lego is in storage at my parents' place but I do miss it, except for the horrid noise of digging through the bin for that one piece I so desperately needed.