I label however I only label Hosta's and Daylilys!! All others are on there own!!

I can understand that! Those are the ones most likely to get mixed up for me. I don't often have more than 2 or at most 3 of another variety of plants, so those are easier to remember. Although, as my collections grow, and my memory fails....

well, I need markers.

I label only my roses, however I do grow mostly roses.

I label mostly my sempervivum, sedum and other alpine plants growing in my raised beds. I did have some of the plants in my perennial borders with the nursery plastic labels, until my grand dogs stayed with us for awhile. Between the two of them I think they found every tag and chewed them up.
Some of those plants I have photos of with the name. It's like the lovely little raspberry colored penstemon with the missing tag. I can't tell you the name of it.

I have a trick to hide labels. I bury the label until it is almost covered except for a inch of tag and then wiggle the label from day to day until it has a slot in the dirt I can pull the label out to read it if I need to and then push it back to hide it. I push labels into the sides of pots to hide them too. That might seem unusual but it works for me and keeps them from disappearing. Sometimes I lose them in the dirt so it isn`t totally foolproof but I don`t have as many coming up missing.