mike -
i say go with what suits your driving style.
if you went off road a lot, or go up to tahoe in the winter, then i would say lift it. if you spend most of your time on those bay area freeways, and you say that you tend to drive... "agressively" then maybe you should lower your truck.
i chose to drop, but i'm not saying lifting is bad. it's whatever suits your personal taste, and what works for you. i think lifting your truck with the goal of making you drive slower is only going to lead to a roll-over one day. it takes more than a lifted truck to make you change your driving habits.
becareful not to lift just because it "looks cool." i think lifted explorer look great, but a car with a high center of gravity doesn't suit my driving style, and from the sounds of it, doesn't suit yours either.
since you're in the bay area, check out
Explorer Express in Richmond. i believe you can test drive their demo explorers that have been dropped 1 3/8" and have performance and suspension packages. then go on one of the board's 4x4 runs and see if someone will let you demo their lifted X.