I have to fight against my hoarding tendencies, but I figure that for small stuff, the likelihood of getting so much that it's a problem is unlikely. Even if I had 100 screwdrivers and 100 tape measures, that would be a bit odd, but it's not enough for a reality show to make an episode about me.

The stuff you have there is all pretty small and not terribly expensive, so I don't think it's very hoard-ey.

I did have to get rid of a lot of my computer equipment that I was hoarding...rack mount servers are sort of addictive because they're inexpensive and powerful, so I had a bunch of them taking up way too much room in my basement. I've given all of them away to friends and coworkers and replaced them with a few tiny gaming PCs.

that diagonal cutter seems a strange choice to me. Care to say more on why that particular item? You already have a pair of scisors and a cutter in there...

In my EDC case / kit(s) I tend to add a pair of grippy pliers instead of cutting pliers - think Knipex Cobra or the Knipex parallel pliers for grabbing / tightening stuff.

I just gradually added that one in - the scissors don't really cut wires or zip ties.

the other "cutter" is just a very good letter opener

You may be right, I use it much less frequently (but when I do use it, it is the right tool).