Experience in Voice Acting

What would you guys say that was the biggest project for you that you did regarding voice acting? Whether it's something for fun or if it's maybe your actual job. For me, I'd definitely say trying to do like 10 different voices...or more in like fandubing, I swear it was...idk how I even managed, but still looking back at it now, I hate what kind of a mistake I made by even doing what I wanted😭