Absolutely. I love any outdoor activity. If I dont get to be out in nature I get depressed. I heavily dislike cities, luckily I live in a forest.
I do a lot of motorized things outdoors which probably is not the most nature-minded but where I live its pretty much the norm, like atving and snowmobiling. But I love hiking, canoeing, camping, horseback riding, etc. Thats really cool that you have hiked all those mountains. I would like to do some serious mountain climbing some day.
Those mountains I did were mostly Class 3's and under. Try to imagine setting a StairMaster or Gauntlet machine on the steepest, toughest setting and just doing that for 5 to 8 hours. Except with fresher air and a better view. You could do them, no problem, as long as you don't have an issue with heights. (The other hikers might stone you to death if you showed up at the trailhead on a snowmobile or ATV, though.) I did a few technical routes that would induce sphincter clenching in most, Kelso Ridge stands out in my mind as the most fun. http://www.summitpost.org/trip-report/1 ... ridge.html
As you can see from the photos, an agile pair of legs can pretty much just walk right up most of it, as long as you don't look down to the 800' drop on either side. Many rope up for it but I abhor a lot of gear, don't even carry a knife with me when I solo in the wild. There's a quote I like from an old John Wayne movie that goes, "Only a man who carries a gun ever has to use one." Yup.