I have, since I was about 9 (that's 21 years now), carried the same Victorinox Swiss Army Knife. I mainly use the tweezers and toothpick, but the blade also comes in handy. I carry this knife everyhere except airplaines, and even then it comes out of the checked luggage as soon as it can.
For my old job I carried a Victorinox SwissTool (it's like a leatherman but way better quality/design).
For my current job I carry a Spiderco locking blade for cutting cardboard.
When I go camping, I carry my K-Bar combat knife. Sure, I don't have much use for the combat aspect, but it's great for shaping small limbs (tree limbs, guys) for impromptu shelter, digging out rocks at the campsite, and even driving tent posts if I happen to loose my hammer.