I've always washed mine every day, wear it down, or I feel ugh.
A hairdresser recently told me to stop for a while, leave it a few days in between, as I had some damage due to colour mess up and was chopping and regrowing healthy, obviously I want this done as well and as quickly as possible.
I hate to say it but she's right. I still feel ugh and will be back to every day once it's healthy and strong again, but I have noticed that the condition is improving.
My hair is very lightened, so doesn't get oily, I just like washing it and I add conditioning oils in. Mine is long and poker straight and I'm bed head in style, I do nothing fancy to it at all because I'm useless and it's looks lovely just left alone, so really I don't need to wash it every day, I just like the feeling!
For hair that isn't coloured to swedish blonde, apparently washing every day strips your hair of oils, so it might feel or look less clean as it produces more to compensate, but if you stop washing so often your head gets used to it and balances, so it doesn't need washed to not feel oily. Meaning you absolutely don't need to wash your hair every day if it looks, smells and feels ok.
Dry shampoo is also very popular now for washing less, I haven't tried it as I'm happy to have a genuine excuse to wash mine rather than avoid it, but I've heard lots of really good things about it of saving time and washing less but with really good results.
Maybe worth a try?