Many years ago I got to see a Warhol retrospective at MoMA, and seeing the early works in person was a revelation. My own tastes leaned more toward the "traditional" abstract expressionists and I thought Warhol was too "surface" and not interesting or deep. But seeing them on walls, they're wonderful - playful, vibrant, visually striking. The later work tapers off imo - from some accounts that I've read, the decline happened after he was shot.