Aside from all the benfits of vaginal birth the biggest two things for me were recovery time, and that I had had an unpleasant experience with the anaesthetic during my CS.
Plus I had already had 2 vaginal births, so I had something to compare it to. One of those vaginal births in particular had been wonderful and I was keen to do that again.

That was really pretty much it for me and a VBAC was it all the way, I never really considered an elective CS. I do think my decision was much easier given that I had already had 2 vaginal births.

best of luck and I hope you find certainty in your choice.