How do I watch Gundam?

GoldenOreo said:
Here's the thing about Gundam: you're free to watch in any order you choose, and omit any iteration you like, but only as long as it isn't Universal Century. Within the Universal Century series', I feel the majority of them are necessary to watch in order to fully understand (or enjoy) series' that take place later in the Universal Century timeline. As far as Universal Century shows go, ones that you can safely omit are MS Igloo, The 08th MS Team, and G-Saviour, and I think most would recommend you skip all of those except The 08th MS Team, which I've heard is very good. You could also skip Gundam 0080 and Gundam 0083, but those two are also good, so although they aren't necessary to watch, I think you should still watch them for enjoyment's sake. Also, Gundam Thunderbolt is part of the Universal Century timeline as well, and I think it's worth watching.
But as for the rest of the Gundams, you don't have to worry about what order to watch them in. Although some alternate timelines are said to actually take place far in the future after Universal Century or other timelines, there is little evidence of this in the shows themselves. Turn A Gundam is chronologically the last Gundam series because it takes place after every previous timeline in a new timeline in which humanity has started over, but because a new Gundam series is released every two years or so and will probably continue being released for a long time, it's pointless to wait and watch Turn A last because there will always be a new Gundam coming out, so you can watch it whenever you want, or even not watch it at all. Reconguista in G is also kind of strange: it does take place in an alternate timeline, the Regild Century. But Reconguista in G is, if I remember correctly, directed by the creator of Mobile Suit Gundam, Yoshiyuki Tomino, who himself said that the Regild Century comes far in the future after Universal Century. So Reconguista in G is technically the latest Gundam show in the Universal Century timeline chronologically, but I still don't think it's necessary to watch, and it has a lot of bad reviews, so you're free to choose for yourself whether you watch it or not, and when you watch it if you do.
I can't really say what to watch or not watch. Just read reviews and summaries if you're thinking about watching a Gundam, and if it interests you, watch it and see for yourself if it's good or not. You might like some of the ones that other people dislike. And like I said, with the spinoff series' it's up to you whether you watch them and when you watch them. If you're watching a Universal Century series, though, just make sure you know when in the timeline the series takes place before you watch it, so you can watch them all in the right order.