@Jim: "I think the biggest challenge is finding what works for you and not what works for other people - experimentation is the key - not 'specific techniques for patching modulation + utilities in Eurorack patches" --> nicely said. Modular has taught me a lot about "groping and listening my way through" sound design; in fact a great boon of modular is that it absolutely forces experimentation. A lot of my earlier VST time was cursed with "nail that patch I'm hearing somewhere" vs. playfully getting to know the ins, outs and quirks of a particular instrument. Howard Scarr can nail patches, do the Batman scores, write the Virus programming handbook and the Bazille Cookbook, but I still have to grub my way around hearing and understanding the building blocks of sound design (though Rob Papen's fabulous "4 Element Synth" helped get me past ground zero).
@Garfield, good question, yes I have a bunch of filters (and waveshapers) but I'm probably underutilizing those too. The more of this thread I write and read, the more it occurs to me a lot of my time on modular is focused on really exploring 1-2 modules at a time (which is all well and good), and pretty rarely am I focussed on building a robust signal chain that has a chance of having good sonic depth, interest, movement, etc., while still being a good "role player" and fitting into a reasonable mix.
Net net, this is helping me shift mindsets a bit from "OMG there's still stuff I don't know about this module I've got to focus on it more" to "make sure to spend a good chunk of making a nice and full sounding patched instrument, and enjoy getting to know modules a bit better along the way."
... AND while we're talking filters, I have to give a shout out to my latest addition, Jolin Agogo (Octal LPG). Sounds really good and it's great to have 8 LPGs in a small package!
Happily, all this leaves me really jonesing to get back in front of my modular rig -- need to wrap up my work for the day and leave some patching time before bed!
Thanks for the ideas and encouragement guys, cheers!