To qualify, there must be one character speaking (mostly) uninterrupted for a sizeable length of time. I've started this list fairly late, so I may be missing some that I have seen.
This is for the chronological timeline of the main Gundam Series known as Universal Century (U.C.). All the other Gundam Universes can be watched whenever you wish. If you want to you can always...
Not a recommended watching order list, however all shows on this list except for Gundam Unicorn work as standalone.
Planned watch order for Universal Century ("main series") Gundam.
All complete and incomplete series I own.
Incomplete: Inuyasha, Ranma 1/2, 08th ms team, Pokemon, Votoms, Niea Under 7