A lot of them, actually, feel like possibilities. You've got the first album, the first album with James (and first on a major label)...then, okay, Awake, FII, and SFAM wouldn't have made much sense, but SDOIT could've, with it being DT's longest work and the first with a "clean slate" for Jordan after the big breakthrough of SFAM. ToT's break from character makes it a bad fit for self-titling, but Octavarium was a "return to roots," so that qualifies too. And then there was Portnoy's whole hyping of BC&SL as this ultimate DT album with Metropolis, 8V, ACOS etc. all rolled into one album. And of course then there was the split and Mangini's entry with these past two.
So the only ones that seem like there's zero justification for self-titling are Awake, FII, SFAM, ToT, and SC. The others, you can kind of see it. But of course WDADU is the most obvious, being the first.