Hi DirtyHarry
I remember the circumstances that lead to your Namibia ride and enjoyed your RR trials and tribulations. This was most probably the best thing you could have done to give yourself a break.
I bought my bike in Pretoria in Jan 11 and drove 1700km down to Cape Town over 3 days - solo. It was an enjoyable ride through Potchefstroom, Groot Gat and Carnarvon. The ride itself was great, but I did miss company during the stops. You stop at a grubby Spar in Bloemhof and have 10 PDIs approaching you, wanting to watch your bike / food / money for booze / steal your things. You don't have anyone else to talk to, so you fight them off and then worry about your things whilst buying lunch. I eventually rode to the bridge over the river outside the dorp to enjoy lunch.
Fortunately the company of nice people at night stopovers broke the monotony - especially sleeping over at friends on a farm in the Carnarvon district.
It is a mixed affair, but if you have the company of someone you get on with, riding with someone is better - for me. Motivating yourself to go on a ride is sometimes an effort, but if you can make an occasion of it by having someone to join you the ride becomes an event 
My 2c...
Yeah Jacobsroodt, we all seem to be different.
I might be lucky. I can enjoy both. I can talk kak the whole evening with other people but I also can be on my own without the feeling of being lonely or bored.
Funny enough there was not one single situation during the 16 days of my solo trip that I thought I could not handle myself. From that perspective I did not miss company at all.
The only time when I hate to be on my own is when I have dinner in a restaurant. I have only done that once in Swakop, so it was fine.
I could have done the trip with my wife or with some mates and it would have been epic in a very different way.
I am very glad that I have tried to ride solo and I would do it again in a heartbeat.
Riding solo is something special.