I did try to modify the poll to add an "all of the above", after Digidave's first post, but I'm afraid that not being a moderator of this forum, I couldn't.
I'm a lego man myself, but confess to a lot of taking things to bits (and seem to remember strenuous attempts at the age of 5 to build an aeroplane in the garage out of my little brother's redundant cot which G.Sr (an ex-supermarine designer, so he probably encouraged me, although I don't remember it) had disassembled and stored as firewood.
Mechano, nope, never got the hang of it - I always enjoyed the relative immediacy of Lego.
G