I'll take the second one first.

My Klein Rascal. Maybe I'm looking back to my 140# past with rose-colored glasses, but that bike was awesome and I couldn't wait to ride it every single day.

I built a cross bike for myself back in 07 that I couldn't wait to roll up to the line on each and every weekend. That also coincided with a time that I was more fit than at other points in my life. Funny how that works.