...I have a really tall tripod, but it seldom goes outside with me at 9.5 lbs. without head.
Me too. IMHO no one tripod does it all! Currently I have 5 in the lineup: light, standard, video, xtra tall, and tabletop. Various still and video heads get traded around on them, depending.
Everyone's needs are different, too! If I have a tripod with me when hiking, it will be the lightweight, not the xtra tall! I find I use the big rig to provide a high-angle shot for timelapse of people doing stuff, though I originally bought it to shoot over crowds. The tabletop doesn't get used on tables, it spends most of its time on the ground.
I am a bit of a sucker for camera support. As Wilt & Tom wrote, low angles and high angles are some of the primary tools of composition. Don't miss them! Oh, and you might need to carry a stepladder, too!