...sooner or later.
Well, if you like science fiction anime, chances are you know of the difference between the two classes of giant robots:
Real Robots: Giant robots that in universe are mere machines, usually mass produced or whose design history is either explained in the show or outside of it in supplementary materials. They have limited ammo and their powerplant is more or less explained with in-universe science and unintelligible "technobabble".
Exponents for such shows are the Macross series, Gundam series, among many, many others.
Super Robots on the other hand, are their predecessors and explanation about their powerplant and many other things is generally nonexistent and actually nobody cares. Their design is usually bordering on the ridiculous just to look cool and other marked characteristics. Nonetheless, they are great fun.
Examples of this class are Mazinger Z, one of the stories that helped popularize the genre (and from way before I was born, yet I watched it as a kid!), among many others.
I would like to introduce you to the fun of these two genres in case you don't know them with a few shows that maybe you would like to watch in an uneventful evening or a night with nothing to do.
Super Robots: Shinkon Gattai Goddanar
http://www.animeseason.com/shinkon-gattai-godannar/
Real Robots:
Mobile Suit Gundam 00
http://www.animeseason.com/kidou-senshi-gundam-00/
Macross Frontier
http://www.animeseason.com/macross-frontier/