Individually, my favourite ones are the neutrinos and the strange quark. But then I also think what if I had two up quarks, two down quarks, an electron and an electron neutrino? Then I'd be able to play at beta decay! Or I could get an up quark, an antidown antiquark and a gluon, which combine to form a ρ+ – a rho meson (though I'm not sure how I could indicate that I wanted it to be a ρ and not a pion). Or I could just get a full set of quarks, for the fun with different masses. Or... or.. or...
Help! Which ones should I get?
-duck-
Jiggle them around a bit to give them the extra energy to be a ρ+ ?
^ my actual expression.
Apparently if you "Can't decide [you could] Order a Particle Pack!". That's my suggestion.
(it's only $313! plus shipping.)
I saw these a few weeks back and I couldn't decide either. (Although unfortunately I didn't quite get the jokes, my head explodes at particle physics, needs more evlolution.)
Of course, if you like your stuffed whatses to serve more than one purpose, you might consider the resemblance between the z boson and Blinky: if you got tired of playing with subatomic particles you'd have the option of pretending you lived in a live-action video game instead.
1 *cough*