None are critical, but I like the scissors and nail file of the Executive SAK.
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I went around this mulberry bush a number of times before I finally settled on a SAK Classic and Leatherman Brewzer. The SAK I carry loose in pocket and the Brewzer is on my key chain. I found the smaller multi-tools to be lacking. They were just bulky enough to be a little cumbersome in the pocket but for me didn't provide enough utility to justify the size. In my own daily needs I rarely am far from tools and I keep full sized multi-tools in my vehicles. I was sort of on a scale-down endeavor and when I was honest with myself, I realized I rarely used the actual tools on the various small multi-tools I was trying and carrying. And, the scissors on two different Leatherman's dulled so fast it was ridiculous.
What I did realize is that I love having a small pair of scissors handy (stray beard hair, unruly eye brow hair, string on the shirt, finger nails, etc.), I love having a nail file handy (especially if I trimmed them with the little scissors) and I freaking love having that plastic toothpick handy! I can't tell you how many times I reach for those three tools. You could take the knife blade out of the Classic and I wouldn't even notice.
The Brewzer handles bottle opening, prying, etc. and then whatever pocket knife I'm carrying.
I played around with pens, even the tiny little SAK one's, different flashlights, all of it and just came to the conclusion that I rarely ever used those things let alone needed them.
I matched all this up with these Foster Grant 2x reading glasses that fold all the way down (in half, telescopic earpieces, etc.) into a 3" plastic case that, with the removal of several other items I didn't really need, fits well in my pocket. Paired up with a cell phone and I never feel like I'm lacking.
I know others have different needs but like I said, when I really paid attention and was honest, that's what I came up with and it has been working well for a long time.