I sympathise entirely
I was sat around at home after work, and suddenly had an unsolicited call from someone who had a problem with their laptop.
I swear my reaction was almost one of PTSD, and I refused to take the call until I had more information and had calmed down.
The idea that people may keep calling to ask about any and all problems is an idea of personal hell.
Maybe when I was 14 or so, when I was enthusiastic still about cleaning crap from people's computers and helping them out, but now, embittered by time and work, I don't want to fill up my own time with a stream of petty issues.
I imagine car mechanics have the same problem - so I suppose at least we don't have to climb underneath oily, greasy cars out in the cold.
I do feel sorry for them, because they're usually old and poor, but that makes it worth my time even less, because there's no point me charging a huge amount they won't be able to pay.
Oh, and that anecdote about "what laptop to buy?" is a good one, because you then have to ask them their requirements, because to be honest, any cheap shitty laptop these days is more than good enough unless you want to game. People also get confused when 15.6" laptops are cheaper than smaller ones.
But the best part is, the time you actually consider the question properly, and give a good suggestion, they end up buying some other piece of crap anyway, and wonder why it's not much use.
That said, I've had my advice requested a few times and it has been adhered to, so it's not all bad.
Keeping completely old pieces of crap is another problem these people have - I don't think they realise how old their machine is, and how much better one for less than £300 would be if they just opened their wallet. After all, it saves you time when you're using the machine.
I've seen silly examples where people have spent money fixing/upgrading ancient shitty machines when they would have spent a similar amount if they just replaced it completely and achieved a far superior result.
I'm glad you also touched on inkjets, which are a bloody trojan horse. Don't let one in your home.
A cheap mono laser for printing out your flight passes and instructions and so on, and an online print service if you actually want quality photos produced.