I remember "discovering" a second hand copy of Innervisions whilst at university in the early 90s.
Up to that point I knew Stevie Wonder as the guy who recorded "I Just Called to Say I Love You", a song I hated as a kid. Well that opinion changed pretty sharpish I can tell you.
I've bought so many albums and singles since that I really, really like but I don't think Innervisions has ever been bettered. Just my humble opinion of course.