Was my iPod touch until............I bought my iPhone
It's the best gadget I have ever owned, it's so complete for what I need to do and saves me carrying around 3 gadgets and wasting electricity charging them all.
My QNAP TS-219P NAS would come close as it is heavilly used, but then it's cost me far too much money (as it resulted in a Netgear EVA8000 (now on eBay), a Sonos BU150 package, and will result in a Asus O!Play and Sonos S5 ...)
However I think it's almost a tie between my Sky box and my Nikon D300.
Oh sod it - my Top gadget has to be my Bialetti 8 cup Moka pot
For me its my Topfield 5800 or now the 5810 with Mystuff.
It gets the most use out of anything that plugs in, in my house and performs brilliantly with very little effort if it does go wrong (twice in 4 years)
about 25 years ago, I borrowed a telescope from school, man it was big, and the 1st time I seen the moon personally.
Looked brilliant..
Had to be an all time high..
Shame I had to give back the scope..
I have so many toys, they are not worth mentioning..