...which processors/effects do you find yourself reaching for on the DM and which do you use within your DAW? I love my UAD for compression, EQ as well as their modeling of the FATSO, which is practically required for hard rock/metal. I also use the Duende SSL plugs for my virtual console.
I do very little, if any, rock and metal. 90% of my work is in instrumental contemporary/pop jazz. The remainder is a smorgasbord of mastering/mix jobs I do for others. So, my choices might be different than yours. But, I absolutely rely on the DM eqs, compression, TC 'verbs and delays on a majority of my work. I use the EQs for 'surgery,' often combined with ProTools channel strips for sound shaping. I'll use the PT stuff for tonal adjustment, and - say - a DM EQ with a high-pass filter for final mixdown. The DM's 4 band parametrics are just more precise for that kind of thing.
Another example would be a parallel compression setup, using Bomb Factory plugs for power, and the DM for additional mix boost. This combo is extremely handy for elements like kick drums which have to pop through a denser mix. I have a series of TC 'verbs and delays I've edited specifically for my guitar tracks. If you've worked a lot with digital delays and 'verbs, you know they almost never sound right unless they're carefully edited. Still, my Lex MX200 is good for specific things; I'm mixing a piece with sax tracks now; the Lex really works on reeds, as well as string tracks.
RE: Yamaha: I used the O2r's 'offspring,' the AW4416 for nine years. Did a couple of albums with it. To be perfectly honest, despite how good that mixer/recorder was, I'm not much of a fan of Yammie's idea of 'natural sound.' To me, that's a contradiction in terms. Something about the math/processing, combined with the weaker pre amps and questionable conversion which adds up to something lacking to my ears. The Tascam/DM concept is far more pleasing to me; maybe it's because it's a later iteration of digital mixer with much better conversion. Or, perhaps there's something else going on. I think the higher sampling rates help too - particularly with signal processing down stream - mastering, etc.
Capt Dan