I'll buy almost any new module because I like to have them all but looking at the MOTM catalogue there are some missing stuff, mainly control modules, quantizers, sequencers, voltage processors or even a very good analog delay is what I'm personally missing and what I'm buying from other dealers.
The new digital stuff is also very interesting and I can't wait for the CG or the wave table oscillator.
But it's just me and I'm more interested in making music than DIY stuff. I need more 'unconventional' modules.