Popwerpoint! In Beamer is too easy to add formulas and difficult to add graphics, so people present walllllllllllls of formulas. Powerpoint is on the other extreme, so every formula is painful and you use as few as possible. [Mathematician, but now I'm mostly working in applications to Physics.]

Anyway, for my last talk I needed a lot of graphics of polynomials, so I used Beamer with a few macros of Tikz to make consistent graphics.