Neon Genesis Evangelion, Code Geass: Hangyaku no Lelouch Recommendations
Epic mecha battles, a threat that might destroy the world as the main characters know it. Both of these manga feature some of the most epic mecha battles I have ever seen. The main character in both manga is angry at his dad and fights in order to show this to his dad. If you like one of these manga, there's a big chance that you like the other one too.