So, most that know me, know my largest pet peeve is the sharpening notch before the edge starts, really bugs me and is usually a show stopper for me to buy.
next would be blade play, that also irks me.
But what prompted the thread is a blade that I received today, blade grinding. I've made a few fixed blades and I know that I favour one side while grinding more than the other, much I guess like being right or left handed, you tend to do that a little easier or smoother. The folder I got today has one side, no big surprise it's the side with the logo on it

that was ground fairly flat, while the opposite side had
a sizeable ripple about mid way of the blade, from spine to edge, which makes sharpening a pain, it irks me, I guess I'm easily irk'd ?

I'll not mention the company on this but it's a traditional type slipjoint folder, quite small, single bladed.
What hurts the most on this folder, it's pretty small and narrow bladed, so you don't have a lot of blade to try and work out the kinks. I've emailed the Mfg but I'll see where that will take me, probably no where, but small or not, over $50 shipped is not something I can afford to just take it on the chin. The distributor wouldn't be at fault, in fact I had asked them a favour to check if there was any blade play and they did check before shipping, appreciate that! Part of the trouble of not being able to put hands on before you buy. My plan was this knife would be my 'Airplane riding folder' should fit the definition they have put forth, if they keep it in place.
I've sharpened it now, got the rippled side to be flat along the edge now, luckily didn't eat too much of the blade in doing this.
I've seen this on other knives from different company's, some high named ones, I'll not bang on them but the email I received back from them when they got my knife was, I must have twisted the knife in order to have those ripples appear. ? but what's odd is, it's just on one side, to twist a blade to make it do that would also show on both sides, I gave up on that fight. Wasn't worth it if that was their stance.
Hmm I must be in a bad mood ? lol maybe so, you can get cynical I guess at times.
So, I know you guys/gals have your own pet peeve's, so list em' if ya got em'
1. Sharpening notch
2. Blade play
3. Poor grind
4. Poor fit and finish
G2