I alternate between Lacio Lacio, Herbal Essences Long Term Relationship Split End Mender, and Pureology Instant Repair Leave-In.
I like the Lacio Lacio for when I want to wear my hair with lots of movement and body. It's quite light, but still moisturizes really well.
The Herbal Essences is heavier, so I use it for when I'm not concerned with movement, which is pretty much 99% of the time, because I bun. It also has the advantage of a creamy formula, smelling freaking amazing and being inexpensive.
I use the Pureology when I need to air dry my hair. Normally, my air dried hair is a hot rough mess, but with the Pureology, it actually dries softly and smoothly. The consistency can be strange though...it comes out like a watery gel and it's easy to use too much.
I use the Herbal Essences most often, but I don't have a favorite out of the three...I love them all. Hth.