GDI: Disruptor, Juggernaut, Mammoth Mk.II, Titan, Orca bomber, Hover MLRS, Disk Thrower
Nod: Artillery, Cyborg Commando, Tick Tank
Both sides: Harvester, because when filled with blue tiberium they explode very nicely
As you can see, GDI has my most favorite units as it is my favorite faction