Crystal 100%. Can titrate dose however I'd like and I don't have to worry about weird additives. If I want some speed or something else I can add it myself.
Pills, could be bad quality MD, may contain other actives, could be unevenly dosed, are way bulkier, and IMO not really anymore convenient. I'm sure some people are a bit more sensitive than me but I have no problem eyeballing doses. A scale that measures to .01g can be found on amazon for $10, probably cheaper than a pill of MDMA in most parts of the world.
I avoid pills at all cost, even when I know the people pressing them and what's in them.