Hmm...
Well, I could have some fun with these...
Energon X (energy/energy blaster)- Energon is my main, and, as I'm a little bit of a classical buff... well,
Also Sprach Zarathustra would make a nice intro with appropriate backlighting (it's one of those pieces that pretty much everyone knows, but no one has any idea what the title is- the piece was used in 2001: a Space Oddysey for when they found the Black Monolith, just as one example).
For those times when I'm 'in the zone', landing on my opponents like God's own fist,
Dies Irae (translates roughly as "Wrath of God") from Verdi's Requiem mass would rock... also useful when I'm about to pop a Nova (although some creative slo-mo would be needed).
And for the inevitable face-plant, "This is your Life" by Switchfoot.
For my alts... hmm. Well, for TeChameleon, my future AR/Dev Blaster, "Ammunition" by Switchfoot would do nicely.
For
Wall of Knight, my bubble defender, "The Warrior is a Child" by Twila Paris would fit perfectly (although you'd have to read his bio to understand why... and he's 8 feet of armour plate, so it's not what you're thinking)
For
Heal Walker, my Fire/Emp Controller, "Fanfare for the Common Man" by Aaron Copland would suit him down to the ground.
For
Flashpoint Zeo, My Fire/Fire Tank... hmm. "On Fire", by Switchfoot, is an obvious one, but doesn't really fit the character... oh well. Wait, some thought and a quick review of my playlist on Winamp reveals a better choice- "Ritual Fire Dance" by Falla seems to suit him.
For
Argonath, my Dark Melee/Invul Scrapper, "Still haven't Found what I'm Looking For" by U2 is perfect.
For
Thomas Savage, my Peacebringer, "Alone Together" by George Shearing. I shouldn't need to explain
that bad a pun.
For
Tempus Fugitive, my Warshade, it's a toss up- maybe "History is made by Stupid People" by the Arrogant Worms when he's in an unusually good mood, or "Sunday Bloody Sunday" by U2 when he's not in such a good mood.
And if they ever add wings as a powerset/costume option, I'm making a broadsword Scrapper with wings whose theme is either Kevin Max's remix of "Angel with No Wings" or U2's "Angel of Harlem".