Overall Synopsis: "My Wife Is Wagatsuma-san" is a pretty cliched series with some flaws (lack of characterization being one of them), but the laughs and unpredictable moments in the time slips makes it enjoyable.
Assuming you've already read a summary of what the story's about, I'll just cut to the chase.
The various sight gags, accompanied with the series unique art style, make for some very enjoyable reading. The flash forward style time skips (think Family Guy combined with Butterfly Effect.... yeah that sounded awkward), which you would think are predictable, are surprisingly not in some cases. Because as the protagonist Aoshima learns, the future isn't
set in stone and is prone to various changes based on his present action or inaction.
As for the characters themselves, there needed to be some more love spread around in their development. The most developed character actually turns out to be Ran Itou, who goes through quite a roller coaster ride of changes. However, the titular character herself, Ai Wagatsuma, is that typical Mary Sue trophy wife trope that we've come to see in many other series (think Belldandy from "Ah! My Goddess"). Other than a few moments that humbly characterize her - the swim meet, a weakness for certain TV shows, and even a string of jealousy - she ultimately has no true character growth. The same goes most, if not all, of the cast of characters. As much as I like some of them (Masao Komatsu is my personal favorite and an awesome scene stealer), they seemingly remain static throughout the series.
That's not to say our lovable loser Aoshima isn't without his merits. Although he fills in that cliched useless main character with no redeeming qualities, I find that to be ultimately false as the story progresses. As one of his benefactors later point out, he rises beyond himself to face certain occasions, and he carries his companions with him as he does. He is also quite a compassionate person and would go out of his way for people, even total strangers. And after seeing his various time slips just to secure his future with Wagatsuma, you start to notice that he overlooks his own desire for the sake of his own friends to save them from trouble, and even for a stranger to save his life. These are all observable qualities that, in my opinion, make him rise above the typical character trope of a useless guy everyone loves for really no reason than for the sake of the story - I'm calling you out, Tenchi.
The story wraps up a little fast at the end and leaves some unanswered questions. I think if it had at least one more chapter as an epilogue, it would have left a more satisfying ending. In spite of that, I'm glad to have read Wagatsuma and I've enjoyed my time with the series.