After my first real ascent, a 2007 climb of Mount St. Helens, I was almost exclusively a county highpointer. After two years away (2009-2010), I again call Seattle home and enjoy working on many lists, especially prominence-based, though counties will always be my first love.
My Trip Reports are almost universally unhelpful.
Lowest point reached - Badwater Basin, Death Valley
Highest point reached - 17,006' on Izta
Highest summit reached - Nevado de Toluca (15,354')
Some of my favorite trips and summits - related mostly to the epic scenery - in no specific order:
Dog Canyon Rim, NM
Various Ouachita county highpoints, AR