It's by far my favorite anime. All of the arcs are extremely entertaining, the relationships between charaters are the best I've ever seen, and not to mention the development of the entire series as a whole makes me certain when I say nothing comes close to topping this. I love this series and fandom from the bottom of my heart.
I personally just rewatched this show after about a year, and I can say that the second time around only made it better. I'll always recommend this anime any chance I get! I could sit here and tell you how I think I felt watching this incredible price of work, but I personally don't think I can cover in words how this series makes me feel and how it's affected me.
You'll just have to watch it to understand how wonderful it is, and then I'm sure anyone can understand what i mean when I say it's truely is a masterpiece worthy of all praise.