My jet black iPhone 7. A bit of a cop-out answer, but I'll be damned if it isn't the best looking, most comfortable (I use it without a case, and enjoy it), and best overall designed thing I own.
It reminds me a lot of the first time I held(/fondled) the very original iPod - it felt (at the time) like damn-near-magic alien technology. (Somebody else mentioned an eInk Kindle, for me that doesn't come close - sure that screen is really nice to read, but as an _object_ it feels, I dunno, plasticy and uninteresting...)