I like all three to a certain degree:
ADTOE: Was close to god tier for me when it first came out, my opinion has softened a bit but it's still at least an 8, possibly 9/10 album. Some of the long tunes go on a bit too long (LNF and Outcry, not BITS and BAI). Drums are a bit too quiet but are acceptable sounding.
DT12: Probably my least favorite of the 3 MM albums, I'd probably give it a 7/10, lower that to a 6 if we're considering the drum sounds. The shorter songs are mostly solid with TEI, BTV and STR being exceptional. Illumination Theory has good parts but lacks cohesion, I'd rather have had a shorter IT and another song or two, and the Easter Egg should have been developed into a full song. Drums went from being too quiet on ADTOE to obnoxiously loud and dull sounding here, and that's probably the biggest barrier to me enjoying this one.
TA: This is still new, especially for such a huge album, but I'd say I rank this somewhere between ADTOE and DT12, so probably a 7 or 8. Some of the songs still haven't really stuck yet (Ravenskill, A Tempting Offer, The Path That Divides), and I have general complaints about the execution (too many parts played by guest musicians instead of the band doing something cool, too many songs ending the same way and almost never flowing into the next one, the general pointlessness of the NOMAC tracks aside from Descent of the Nomacs and Power Down, and of course ungodly amounts of cheese), but in spite of all that this is a hell of a great album with some awesome moments. As far as drums go, I think this is the best of the MM era; yeah the snare drum sounds kinda triggered but it actually has power and doesn't sound dull and detuned like DT12's did.