I have to agree with Knut, here. Taken out of context, it is hard to judge the value of a clef's design without seeing what the rest of the symbol set looks like to judge the overall cohesiveness. For example, take a look at the November treble clef by Robert P. His entire font is quite "inky" and bold. I think it would be a HUGE mistake to utilize the treble clef with almost any other font but the one it belongs. I think we can all agree that this is equally true for any text font we've seen. We would never take our favorite letter "A" from Bodoni and use it with the rest of Baskerville, for example. It just doesn't make sense. Enough said. Thank you, Knut for bringing that up.Knut wrote: ..., while I understand that there can be many preferences with regard to a single symbol like the treble clef, as a font designer, I find it interesting that none of the opinions expressed in this thread seem to take the aesthetics of the larger symbol set or font into account when judging whether or not a clef (or any other symbol for that matter) is bad or good, better or worse...
Now, I'd like to contribute a little to this comparison conversation. I now show you all the treble clefs that I've designed to work with LilyPond (most, but not all, are actually available at the moment). A good portion are of my own design, others have been re-mapped for compatibility. Two of these are highly experimental and one can only work with LilyPond (not the clef, but a few other critical symbols in the font). I know these are taken out of context as well (sorry), but for the sake of the conversation, I present you with the current set of "classical" style treble clefs:
And if that weren't enough, I think I'll also add a twist to this conversation by adding the LilyPond-compatible "jazz" designs to the mix (I know, this is going into dangerous territory. Maybe there should be a different thread about these?):
Alright, I don't expect everyone to recognize them all as easily as the initial set that started this discussion. You'll recognize the first "classical" clef from LilyPond's default font (Emmentaler). You'll probably also recognize the design of the second "jazz" clef, re-created by a past LilyPond user to mimic the famous Sigler Jazz treble clef. Other notable fonts that are present are Profondo (the LilyPond-compatible "Bravura"), LilyBoulez (the LilyPond-compatible "Boulez"), and Scorlatti (my own rendition of the "SCORE" glyphs).
Does anyone recognize the third "jazz" clef? Bonus points if anyone knows where that one came from. DOUBLE bonus points for someone who knows where the fourth "jazz" clef came from

Anyway, I'm interested to hear your thoughts. Critique away!