They're all pretty good, but I think "Defying Gravity" is John's best solo album. The songs seem to be stronger and better written. All three albums are similar in many ways to Mastedon, but they are less of hard rock and more straight forward rock. I'm not really a fan of just rock, but I have listened to Defying Gravity many times of the years. The solo albums are more vocal focused and it works quite well.
Fundy
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My Christian Metal Website.........
Silence Is Madness
Three Things for a better life...
1 - Believe In Jesus.
2 - Love one another.
3 - Let God be the judge.
That is all I need to say.