Update
So I’ve tried a few things since the beginning of this thread....
I bought a JBL MSC1 to attempt to do some type of automated room correction and for the life of me couldn't get it to work properly. In JBL's defense I think the one I had received was defective, but either way the software was clunky. Also this product doesn't recognize a Digi 002 as an audio device no matter what work arounds I tried. I ended up returning the device and shopping for headphones instead.
So then I put several headphones under $200 to the test including,
beyerdynamic dt 770, sennheiser hd 380 pro, akg k240, and
the audio technica ath-m50.
I ended up buying
the sennheiser hd 380 pro, feeling that they represented the most clear and balanced sound with the widest range and best isolation. The beyerdynamics were a close second with balance and clarity but the isolation and range were missing. The AKG's were all hyped mids and had almost no isolation. The audio technica's were cool offering similar isolation and range to the 380's but seemed to have hyped mids and harsh highs by comparison.
One of the main things I noticed about the 380's is that I can hear all sorts of things I’ve never heard clearly before in mixes listening through conventional speakers and cheap headphones. The difference in clarity is astounding, and it seems the mids and highs are clearer without harshness I noticed in the other headphones (Beyer excluded).
After the last few days of listening to also sorts of different music through them I started to notice a lot of depth/reverb/spatial effects in mixes I had never really heard before. I can hear editing mistakes, pick scratches, and almost the character of the "room" the instrument was recorded in. my understanding of mixing has completely changed.
when I listened to my mixes I started noticing that I was pushing the tracks to hard and had almost everything kinda cranked (almost to the point of output clipping pre master fader). After hearing the "distance" certain instruments had in a professional mix restarted my mix from scratch. I began pulling up the drums at a much lower level than before and mixed the drums (which are samples) to sound further away. More like I was in a big room or hall with them. This is a sharp contrast to trying to get the drums to sound as loud and punchy as possible (my previous mixing goal). Once these newly lower volume drum tracks were rough mixed I began adding in bass which I compressed and eq'd a bit. I used glen's parametric eq sweeping technique to find a frequency where the bass would ring somewhat excessively and I cut there about 5db and widened the Q from 8-10 to about 5-7. Additionally I boosted the 80-300 Hz range to get a bit more low-end. after all this I was surprised at how much the bass stood out in the mix (because it always seemed to be fighting for space before and now it seems clear and easy to hear). Now I had too much bass and was surprised at how much I could turn it down and have it still be clearly audible. Adding guitars back into the equation was a similar affair.
All in all I feel like I’m making progress with my critical listening and mixing. Now I’m starting to think my biggest mistake was mixing too loud and that my resulting mixes lacked depth, dimension, and clarity primarily because of that.
One other question I have for the "gallery" is.... do you mix with master buss compression and if so how?