Sometimes simple things are just better: here you have a simple key tag that prints well with any printer, is not clunky, can be customized for arbitrary text and still looks good ;-)

To change the text, just open the .scad file and change the text in customizer.
You need a stencil font for the text – I recommend the Scriber Bold Stencil font available free of charge for personal use here. The .stl models use that font, hence the non-commercial license.

Unless you put too much text on it, the tag is roughly of the size of a key.

I actually use a tag of this kind that I designed and printed in PLA several years ago, and it lasts. Now I've redesigned the source file to be customizable.