I made the assumption that all the blades are of the same quality, and he was simply asking which ones we were most familiar with/enjoyed using the most. That is how I came up with my answer.Expansion on my answer.
I have at least several dozen sharp objects of KNOWN quality, from small 3" folders (one handed, assisted open, or auto) to modern fixed blades, to fully functional European and Japanese swords.
I distrust blades that are too shiny. Working blades cannot maintain a mirror polish.
Given a chance to assess the quality of the blades, I would select whichever I thought was the best.
Given a selection of blades of equally high quality, I would choose either a rapier or katana (those being the ones I am most competent with) if I expected to be in a large open area.
For enclosed spaces, I'd choose a large fixed blade if there were no need for concealment.
For concealment, I'd choose an auto or assisted opening 4-5" blade.
Of course, this assumes I've made the rather odd decision to leave my guns out of the equation.