Lots of different metres, I believe, but the majority of poems are either hendecasyllables (mostly in, and most of, the first 58 poem) or elegiacs (65 to 116) with 62 + 64 dactylic hexameter. The rest a variety, in particular a range of different iambics.
So I think he falls into the "lot of them" camp, probably. Apparently his pentameters are "uncouth" ... Lucky someone told me: useful to know the right thing to say: "Catullus, so fresh, but his pentameter ... what must one say ... uncouth!"