Gurren Lagann is the go-to giant robot anime for me. It's absolutely phenomenal. I've also seen Evangelion, and while it was an influential series, it wasn't super great. You could call Code Geass a giant robot series, too, but it's... not, really. While there are giant robots, they're not that giant.
Oh, also, Megas XLR. It's not exactly anime, as it's an American production, but there're giant robots, and chicks dig 'em.
I would recommend something else, like Gundam or something, but admittedly, I'm not well versed in giant robots or kaiju...
Also, I tried watching Attack on Titan, which is kind of maybe kaiju, but I just couldn't get into it... The humans' weaponry used is probably the stupidest thing I have ever seen; if people have the technology and craftsmanship to build efficient enough hip-mounted grappling hook launchers to have their soldiers Spider-Man their way around cities and forests in order to cut up giants with swords, then why can't they invent a big-ass cannon to blast said giants from a distance? It'd be safer and more efficient... Besides, those grappling hook thingies are just soooooo dumb-looking...
Oh, also, Megas XLR. It's not exactly anime, as it's an American production, but there're giant robots, and chicks dig 'em.
I would recommend something else, like Gundam or something, but admittedly, I'm not well versed in giant robots or kaiju...
Also, I tried watching Attack on Titan, which is kind of maybe kaiju, but I just couldn't get into it... The humans' weaponry used is probably the stupidest thing I have ever seen; if people have the technology and craftsmanship to build efficient enough hip-mounted grappling hook launchers to have their soldiers Spider-Man their way around cities and forests in order to cut up giants with swords, then why can't they invent a big-ass cannon to blast said giants from a distance? It'd be safer and more efficient... Besides, those grappling hook thingies are just soooooo dumb-looking...