Gintama is the anime that every person should at least commit a couple of episodes to. It's a blend of many genres, including comedy, action, and satire. If you like Gintama, it will be in your top 5 anime of all time, however, it is not for everybody. It's the kind of show that rewards you the longer you watch, and it can be difficult to get into it until you watch around 20 episodes.
Gintama has one of the most vibrant character rosters of all time, in my opinion. Every character is well written and intricately created. The jokes are legitimately funny, which is important for the main appeal of the show. This also emphasizes the serious beats of the occasional story-driven arcs, which are well told and perfectly fit in amongst the beautiful chaos of this show.
Overall, Gintama is at least worth a watch, as it could be one of the best anime you will ever see. The ending is extremely well done, and this show made me laugh as often as it made me cry. Give it a go, and try and stick with it for as long as possible!
Good luck!