I just hit 40 this year. I didn't realize it at the time, but I was watching anime way back when I was 5 years old (1978) in the form of Speed Racer and Battle of the Planets, and later as a teen in the form of Robotech & Transformers (American product with Japanese animation), but what solidified anime in my mind was watching Akira in high school. Blew my mind! Then I saw Bubblegum Crisis! during my freshman year in college.
As soon as I was making my own money, I bought Bubblegum Crisis! on VHS.
Unfortunately, just like in any industry, as soon as people see it's popular, they want to cash in and the quality and imagination in anime got diluted with formulaic high school life crap and propaganda that suits the whims of the Japanese government. (Whenever a sport anime is released, that sport gets very popular in Japan. I lived there, so I know what I'm talking about)
That said, anime is STILL an evolving genre with ever expanding sub-genres and everything isn't going to appeal to everyone.
I've gotten tired of the high school harem anime and I refuse to watch wishy-washy weak male main characters (like Shinji Ikari *shudder*)