It will really depend on your presentation at the end. If off the shelf frame, border is going to give you problem. If slip in album, border looks better.
Glossy looks sharper and color is more pop but finger print issue and more prone to stick to the surface.
So really, it depends on what your final objective is.
What people has little influence over what you should do.
You are simply asking buying a Honda or Toyota type of question.
agree with Hart, depends on how you want to present your works.
and also, every customers expectation is different, know what they want and tell them why you do these if needed to.