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Back before we knew about antimatter we just called everything matter. Ignoring CP-violation for a moment, there is nothing special about matter versus antimatter.
Once we knew about antimatter it was easily to label all of the common particles as matter. How do we do it for some of the more exotic stuff though?
For the Muon and Tau, do we call the matter version matter simply because they have negative charges like the electron? Do we use conservation of lepton number?
For things like the Top quark, how can we distinguish between the two and determine which is the Top and the other the Anti-Top? Did we decide that the matter one was the one with the positive charge because the Up quark has a positive charge?
How about for the W+ versus W- bosons? Does it matter which is the matter W and which is the antimatter W? Have we designated which a matter W?
For Neutrinos it seems extra tricky. Did we go based only on lepton number preservation?
For Mesons which have a quark and a different anti-quark, is the choice of the matter versus antimatter meson completely arbitrary?