Blackbird: Everything about this album scream classic Alter Bridge. Definitely their magnum opus and most defining record.
Fortress: A very close contender for the best Alter Bridge album. Not quite there with Blackbird for me but very very close. Also proof that Alter Bridge always has the potential to top themselves.
Walk the Sky: Yeah, its new but I really do think this is Alter Bridge expanding their sound in a way that is natural to what they've established. I can see this album being the catalyst of something very beautiful in Alter Bridge's career.
One Day Remains: If I was ranking this as a Creed fan it would be at the top of this list. As an Alter Bridge fan though, it is way too derivative of Creed's sound (intentionally or not). While I love that Mark wrote the music, lyrics and melodies here, Alter Bridge absolutely needs Myles' input to be Alter Bridge. On top of that, as a Creed fan I can't help but wonder how big songs like In Loving Memory, Broken Wings and Cruel Sun have been had they been released under the Creed flag.
The Last Hero: A good album, but very over produced, and not my ideal follow up to Fortress. Still, it came out in a very tumultuous period of my life, so it has a huge soft spot for getting me through some serious shit.
AB III: This album and Full Circle are my two least favorite albums from either of Mark's bands. I remember during the recording of Full Circle, Brian said he wasn't sure which songs were for Creed and which were for Alter Bridge cause they sound so similar to each other. Even Overcome and Isolation are the exact same song structure wise. I like half the album, and the four b-sides more than the remaining seven tracks. This would have been so much better as a ten track album, honestly.