I like lip salves, too. I like one by the Body Shop that has shea butter in it. It goes on so smoothly on my lips.
I always look for something with shea butter in it, or something similar because that always seems to make my lips a lot softer.
I also like a lip salve with coconut oil in it. That seems to be one of the best all-purpose bases for cosmetics. I like using coconut oil products because they work so well and are all-natural.