Not at all. And I bet you'll still be learning on the job when you're 48 !
Maybe you'll be more outspoken and experimental in your designs at 28, and at 48 you finally discover that whatever you've been doing emotion-driven" for 20 years, is actually a known phenomena with a name (check out Gestalt Principles and get this lovely booklet)...
Oorspronkelijk geplaatst op Quora: Is 28 too old to start learning about graphic design?"