Hello folks, I'm an infrequent poster, but have read through many of these threads. Don't tell my SSI instructor, but I almost always dive solo, which he forbid me to do.
The reason is simple: I have no close dive friends and choose to dive solo rather than just watch TV instead. I have confidence in my skills, I practice them regularly, and I think I can handle dicey situations in a calm, logical fashion. Of course, confidence isn't overconfidence until one finds himself in over his head.
My few experiences with dive buddies have been such that I do not think that buddies lend a significant measure of safety. My first moves, given an emergency, would be self rescue, buddy or not. There is always someone ashore who knows when I went in and when I should emerge. I seldom have the opportunity to dive deeper than 45 feet or so, and do not linger in the depths, mostly being in the 20-30' range. To keep my skills up and create dive opportunities I often dive in the local lakes where visibility is very low and there's not much to see in any event. Other, clearer lakes are more interesting, but I would rather dive them on my own schedule. My friends who do dive usually ask "Why would you dive there? There's nothing to see", so I don't seek out buddies for these tune-up dives.
It usually comes down to dive solo or don't dive very often. I would not encourage someone to dive solo, but I bristle at those who berate me for going solo as if I were betraying the faith. One of the things that struck me in my dive course was the focus on disasters. It was sort of like teaching driving by studying car wrecks. In fact, I often felt that my DI resented the fact that I was comfortable and enjoyed the instruction rather than fearing it (aslo, he spent a good deal of time giving personalized instruction to the busty gal who was having trouble with mask clearing). I've wanted to scuba my whole life and just recently invested the resources to make it happen.
I am a little bit leery of the "Something bad might happen"-attitude lawmakers seem to take. Motorcycling, sky diving, kayaking, flyfishing, smoking, eating, jogging, screwing...all of these activities have inherent risks. I think there's greater harm in letting someone tell you that you are not allowed to take the risk because something bad might happen. Someone mentioned "think of those left behind" when considering solo dives in the thread about the Salinas guy who died at the breakwater. Of course we should do that, but not to the extent that we fail to live our own lives. I have done that when I planned to dive a new site and the entry looked too rough, or I didn't feel 100% physically (Monastary taught me those lessons), and I have abandoned a planned dive because the small percentage of risk increased beyond my daring threshold. I try to keep an eye on my "risk-o-meter" and stay out of the "foolish" red zone.
Anyways, thanks for the venue and the knowledge that I'm not the only damned fool solo diver. Now I think I'll go start another SpareAir thread....