Mostly super robots seeing as the only thing that could kind of be classified in the real robot genre is Gundam 00 though they somewhat lean toward the super robot side what with the Trans-Am system and all.
We'll probably only watch 3-4 hours worth of anime
So far, I'm probably going to definitely show the following:
2 episodes of Gurren Lagann -- probably the last episode and the episode where they get Chouginga DaiGurren.
1 episode of Shin Mazinger Shougeki Z-Hen! -- unsure of which episode, I need to find one that shows off Mazinger Z's abilities. I'd like one with Jet Scrander and the Narrator doing amazing Narration, but I'm not sure if any one episode so far contains all of these things.
1 episode of Gundam 00 -- probably one of the last ones. Something with Trans-Am and lots of GN Particles.
That's < 2 hours
Things I'm heavily considering:
Super Robot Taisen: OG (the TV series, not the anime) -- just some episode with lots of super robots.
Gaiking: Legend of Daiku-Maryu -- An episode that features Gaiking the Great and perhaps Open Face
GEAR Fighter Dendoh -- Not sure, probably a later episode
Kotetsushin Jeeg -- last episode most likely
Dancouga Nova -- since its one of the few combination robots on the list. Either and episode featuring Dancouga Max God or Dancouga God Beast Mode.
GaoGaiGar -- unsure of which episode, but it seems wrong not to include it
Code Geass -- one of the last episodes