I've actually never seen any of the above mentioned, minus a few episodes of the Lodoss OVA and parts of Guyver. So, you're not alone in that. I wanted to watch Macross: Do You Remember Love but it fell oop during my collecting years and my maximum spending per anime series was $80...It was well over $100 and more now. Never saw or heard of Neo Ranga until now. I'll check out the trailers ,though.Off the top of my head: Lodoss, Guyver, the old Miyazaki films, almost all pre-00 Gundams (I loved 8th MS Team and 0083).
I watched Macross Do You Remember Love earlier this year and enjoyed it a lot. But after investigating other series, it seems that film encapsulates all that the franchise is about, and that other entries are simply iterations of the same core concepts. Gundam on the other hand has had a lot more variety after it broke away from the UC timeline. I'm watching Gundam 00 (not retro, I know) and I'm loving it so far; possibly my favorite Gundam show. I gave it a try some 12 years ago but I guess I was too young to appreciate the focus on geopolitical/economical strife, although it remains slightly touched on.
That aside, has anyone watched Neo Ranga? It seems like a very obscure show to me. I love the openings, especially the second:
I watched a dozen episodes a couple years and surprisingly it's more slice of life than giant mecha/deity action.