I decided to watch this because so many people have watched it and I regret nothing. I laughed so hard at the stupid things they did and how they constantly trolling the audience. This anime is basically random + random + Gin saying cheesy lines + unexpected endings. Everything about this is completely unpredictable. Trying to predict the opposite of what every normal anime would do doesn't work either because they find a way to screw up that logic too. I love how there were times where they just sat around and discussed how they should be doing something or how the company was dying and how they were actually lying about that. You will absolutely love this anime if you like something with absolutely no plot but it still manages to make you want more. They spoof so many things and the most insignificant things come back to bite you sometimes too. They throw in characters you don't think you will see and they come back all the time. If you look it up on wiki it will have a bunch of arcs listed but only 10 of those are actual arcs which they spent 10 episodes fighting it out and talking about friendship and bonds which don't get me wrong is totally fine. They get serious sometimes too and it's kinda refreshing. I loved how they also added in so many inappropriate jokes later on that really make this anime hilarious and stupid at the same time.
Art- It started in 2006 so I thought it'd look like the old animation like Elfen Lied if you've watched that and that art style to me is unbearable but it was actually pretty good.
Sound- Some of the sound tracks are really beautiful and the voice actors were good too. I watched some other anime with the same voice actors and it really gives you a look at them from a different perspective and how good they actually are. Yunan from Magi actually has the same voice actor as Katsura and I absolutely fell in love with Yunan even though in Gintama Katsura was such a derp lol.
Character- There isn't really a strong character development since this anime almost has no story line but most of the characters are really loveable. I really like Gin's attitude and his love of sweets cuz I can relate to it a little too. All former anti-foreign people that fought with Gin were great too especially Takasugi. Even though they try to play him off as a bad guy you just have to love how cool he is.
Overall- If you can stand the random unexpected things that this anime gives you and just laugh while saying wtf to the producers you will definitely like it. I hate anime with no plot but this has become one of my most favorite of all time.
That's it thanks for reading.