I color my hair every 4 weeks due to grays so I switched to sulfate free shampoo to protect my hair and keep the color last longer. Now I'm just in love with the scent and the way the shampoo lathers. It's a but more expensive but not bad when you get it on sale at Target and with a coupon. Plus a little bit goes a long way.
Bonus: I also seem to need to wash my hair less now that I've gone sulfate free. My usually oily hair now lasts 4 days before I get that greasy look lol