GREAT! (woohoo I helped solve something hahaha!).
NI had a sale last year 9 Maschine expansions for $99 and I couldn't resist - at that time I think there were only 12 NI Maschine expansion packs.
When I started with Maschine last year it was nice to have a lot of expasnsions to tear apart, inspect and play around with. I honestly don't use the expansions all that much, if ever now. There only tends to be 1 groove, or particular sound in a pack that I like.
I tend toward the darker expansions packs. I don't have a particular recommendation. Readlly listen to the demo's of the expansion packs on NI's site - what you hear is pretty much what your getting, sometimes a bit more often not.
Maschine importing my own samples or NI Battery / Heavyocity Damage that's what I tend to do.
Pull up Omnispehere in Maschine and create a stab or a pad , sample it, assign to a Maschine pad and tap away. great fun.