Please don't, it's good to talk
Of course if I were a web designer then a VPS may well suit especially as the client volume increases, however I would suspect the manageability of said system to detract from the main-line design business. My target customers are generally those operating in 1-3 man partnerships/Ltd's that haven't got time and need significant support to manage their projects.
Shared hosting (on servers that have low throughput/CPU use) can be an economical way for new web designers to bring their client's websites up and of course email/webmail etc. But why pay more? Well here's a scenario:
Client wants email to remain with current provider, but web designer needs to host website somewhere familiar.
Web designer may not understand DNS to the required level, so calls host for help, host generally explains politely (or not in some cases) "sorry it's out of our control" however this hasn't resolved designer's issue. Help could be provided by accessing the designer's client's DNS control panel to amend DNS settings. Done. Everyone's happy

I hope?
That's my theory. I suspect this model fails with the addition of numerous clients, but I'm small and intend to remain that way.
You're right, I need to also get back on thread...
I notice none of the well respected members haven't joined the debate and that's rather disappointing as I was hoping for a little assistance from those well experienced.

Oh well, perhaps I'm bonkers!
Still, pushing ahead is the only way...
Come on chaps, what's your views/experience on per domain hosting for resellers/bulk package purchasers - if you would prefer PM then please do, would be appreciated.
Regards
Lea