Ash has been such a big part of my life man, I love him. My favourite character without doubt. During the original series when he was just so rash, stubborn and impulsive, made a great character who just oozed personality. He would charge in head first and make mistakes, but he always wore his heart on his sleeve and was so determined with his goal. There was also a wonderful insecurity about him, worrying about how Gary was doing in comparison, etc.
I also like how Ash produces a small team of Pokemon, all quite unique, and develops them all individually, rather than just having hundreds of Pokemon. I mean, there are times when I've thought Ash should've caught a so and so, but generally I'm a big fan of his teams. Obviously, this is because the writers couldn't give adequate screen time to hundreds of his Pokemon, but I still think its worked quite well.
Unfortunately, this anime has always lacked any real timeline, so we've not seen Ash aging, learning, maturing and growing as a person, and its meant we've missed out on some potentially brilliant moments.
Having traveled through the Kanto (x2), Johto, Hoenn, Sinnoh, Unova and Kalos regions, plus the Orange & Decolore Islands, competing in six regional Pokémon League competitions, winning the Orange League, defeating the Kanto Battle Frontier, seeing/ meeting each of the rare and powerful Legendary/ Mythical Pokémon, some on numerous occasions, and continually fighting vigilantly against six villainous teams, Ash has apparently now decided to go to school.