I don't dive alone because I always have someone to dive with, but I would dive alone in the proper conditions and place.
My mommy will let me dive alone, but my wife will not.
There is a Solo Diver course, I think TDI offers it.
I am opposed to someone diving alone, because they could always call me and I will dive with them. Just kidding, I am 100% for diving alone.
I am sure some have diven (is that a word?) alone and regreted it, but I don't know if they lived to tell thet tale. LOL
I am all for learning more and would love to take the TDI class.
Now, many times around here, we splash with our buddy (that way we have a buddy), but by the time we get to the bottom of the anchor line, we head off in different directions and SOMETIMES come up together. But I think that is the east coast wreck divers way of doing things.