I'm actually going through Macross 7 right now, for the third time since watching it with the anime club back in the 90s. I understand that it's a love-hate sorta thing with its fans. Personally, if you can get through the first 12 episodes or so (which even I think aren't good), it picks up in tone and overall quality. Some like it, some don't. It was reasonably successful in Japan. Being a general Macross junkie, I can't deny its place in the Macross canon and enjoy it as light, cheesy entertainment. The Macross 7 movie and Macross Dynamite 7 OVA series that follow it are in the same vein, but with much better animation; I quite liked 'em too.
(To be fair, I'm currently watching Macross 7 two episodes at a time while on the treadmill in the morning, and probably wouldn't be doing it otherwise. :P)
Robotech was also the real gateway into anime for me, though like Bishop above I've largely forsaken it in favor of its original constituent series. Give plenty of credit to Carl Macek and those who stitched together three unrelated stories into a reasonably decent saga. They did better than Voltron (and vehicle Voltron!) and other similar efforts of that era, IMO.