I've always felt that the songs where keyboard solos seem to show up are the one's that are telling more of a story, from point A to point B, rather than a song that really is just focusing on a mood or idea. The synth tone that Pinnella uses really seems to evoke this kind of "journey" feeling. Song like The Odyssey, lots of places in V, The Accolades, etc. Most of the tracks on Paradise Lost were really just focused around ideas (lust, seduction, betrayal), so they really didn't tell a story. Unfortunately, I tend to find the storytelling type songs better from Symphony X, they really take you on a journey.