Charisma is extremely important it may be the most important S. P. E. C. I. A. L. trait there is when getting to know someone at first. If you are not drawn into a person you are not likely to let things go much further than just being random acquaintances.
I say it's very important (just speaking for myself by the way). Not just in the name of love but also in life in general. I have so many pretty women and I forget them immediately. But the ones with the charisma I will remember and actually wanna see again.