Jack Flash Jr wrote:
Back on topic though, I think the key is versatility. Standard is the most versatile in that you can get the most different feels, sounds and songs from one tuning (not least because it's the one we're most comfortable with). Keef plays a lot of open G but his open G songs all have the same Keef sound (which is great mind you). Too much though and you've got a problem. Singe's open E would start annoying me beyond a couple of songs, but it sounds killer for his Pete Green slide.
Standard tuning became "standard" because it made barre chords easier. Once the guitar got to 6 strings tuning in 4ths as it historically had been (in Europe at least) was a problem because the 2nd string would then be a C and the 1st an F. In order to move shapes up and down the neck you wanted barres, and they became a practical proposition once the 2nd went down by a tone and the 1st by a semi-tone.
Barre chords are a big part of playing guitar, so I guess that standard tuning, or any tuning where the strings maintain that relation to each other, is versatile because of that.
I do think, actually, that altered tunings are less versatile - though a capo solves a lot of problems - but for some things they are better, or are the only way to get the piece played.
Another cool thing about non-standard tunings is that they suggest new possibilities to you. Also, as Squonk says, the guitar
sounds different. DADGAD sounds lekker, so does that EEEEBE tuning I mentioned earlier.