The last 3 albums seem to focus on his personal, deep religious&philosophical beliefs&feelings. Although there were a couple very personal songs thrown in there which probably reflected his trauma he was going through in his family/personal life(A Million Lightyears Away-which almost made my son cry when he broke up with his girlfriend).
The projected songs for PopKiller seem to be of a happier/optimistic nature,but thats just my opinion.
Songwriting is probably great therapy for TT, to express his innermost thoughts&feelings--so, I am sure he will continue churning out fantastic songs for many years, even after Strato retires!
