This has been a very interesting thread to say the least.
I did my first 3 solo dives in Kona over the last two weeks.
I must say I did play it somewhat safe as I did the first two in an area where there were plenty of divers and snorkelers in the water. Divers in the water gave me a bit of a comfort level and the snorkelers, I figured, could point out my body location just in case
OK, Seriously, I found it very interesting how attentive I was about my pre-dive checks and how much more attentive I was in the water. I was very aware of my location, depth and navigation. More aware than when I dive with a buddy which, I feel, made me a better diver because on following dives with a buddy I was more aware than I ever have been before.
In the past my compass was a nice decoration that I thought I knew how to use but after diving solo my compass became my friend as did my depth gauge. In past dives I was always aware of my depth but diving solo I was keenly aware of depth and location.
I also found that I was more aware of my environment and looked for obstacles in case I had a situation arise. I kept my depth to 50 feet on all three dives as that was as deep as I felt comfortable going. Had I needed to bail out I figured I could make it to the surface albeit it would have been a painful ascent.
All in all I am happy that I did my solo dives and I am sure there are more in my future as there will be times I dont have a buddy available to dive with but I do think I enjoy diving with a buddy more. Although it was a great learning experience I had know one to point out some cool things I saw and I did feel alone. On the other hand it was just me, some bubbles and the ocean and that was a very cool feeling. So it was a bitter sweet experience.
To wrap up; I learned a lot about my self and I feel that the experience made me a better diver and I do agree that diving solo is not for everyone. It opened my eyes to so many areas where I THOUGHT I knew how to dive or I THOUGHT I knew how to navigate but in reality I was just fooling myself.
Will I do it again: YES
Do I recommend it to everyone: NO
I do agree that if you have to ask, your probably not ready. Just my 2 bar!