In reply to Bruce Hooker:
I'd agree Bruce, but as I get older I find that I'm much more aware of lack of time. So, while I'm highly unlikely to hire a guide as I'm hideously unfit and it would be a monumental waste of money, I might consider, for example, getting a guided tour of a museum if it was available!
But who am I fooling? I don't even like those recorded guided things that are so prevalent these days....
Absolutely with you on the positives of climbing. The closest I've got to the summit of Mt Blanc is (1) a fitness/food/liquids/fuel misjudgment on the Italian side a long time ago. Complete failure and one of the better and more memorable days in the mountains I've had, in that I learn't a lot about what not to do, and without coming close to causing myself harm (in my opinion - Jon would likely say I was lucky), and (2) more recently, a walk up to below the grand couloir by myself just to have a look, as I'd never been there. Another memorable day that rather put me off joining the crowds on that route.
So, I'd not dream of hiring a guide for MB by either of the standard routes, I might well consider it for something a bit more technical, like the frontier ridge. And, as it is a bit more technical, I'd expect to do a couple of less committing and easier routes with the guide first, which would likely be fun and where I'd learn things I didn't know as I would ask them to take me somewhere that wasn't a tourist trap.
So, back to the thought that the OP needs a bit more experience, so he can decide
(a) whether he REALLY wants to climb MB
(b) whether he should have a guide
(c) if (b) is yes, how to choose one
And your last question...... well......
But I've already stereotyped shop stewards!