I like both...but I cant really cleanse my scalp using the bars. I have very thick hair and liquid shampoo is just easier to use...I have to dilute it or either pour it on my head to get it to the scalp. Putting it on my hands and rubbing it into my hair just does not get it. I do love shampoo bars on my length if I have a bit too much oil/serum and I need a tiny bit of cleansing during a co-wash. Shampoo bars have some lovely natural oils and herbs, which attracts me to buy them.
Bars are more expensive since they are usually hand-made and have high-quality natural ingredients, and I have to order them online, so shipping is a factor. I hope to either make my own bars in the future, or use cleansing herbal teas and powders...tryna get away from chemical shampoos.
Wanna go all natural in hair and body care products, including natural liquid shampoos, which I love, but I have a stash of commercial shampoo to use up.