It's interesting seeing how everyone 'rates' their customers!
You pick up a vibe for them over the years and you can tell just by a phone call if you are wasting your time with them.
I get an enquiry and just on the phone call you can tell what the person is like, if i don't get a good vibe from them my gut instinct says 'don't do the job', i find if i ignore my gut instinct i always get agro.
One woman phoned me at 8pm on a Saturday, left a message almost demanding i phoned her back, i'm on a stag do, no chance! Sunday 8pm another snotty message, i already know now i'm not doing the job, then on Monday i'm visiting a lovely customer and she phones again, i answered it saying i couldn't do the job for 3 months' ''Thats no good to me she snaps', i finish the call go back to my ace customer and tell her she'sbooked her in in for 2 weeks time 'that woman didn't get through the interview stage i tell her'!
Bad customers can really spoil your work vibe, it's a very personal thing tiling, so if you've been, liked them, quoted a decent rate, replied to them quickly and they don't reply, then don't sweat it, they weren't the right ones for you.