I personally think memory actually plays a big role in the "subjective aspect of experience". Every new experience is compared to previous experiences stored in memory. Experiences are always better and more exciting the first time. The first jump off an airplane, the first ski ride, etc... But with time, the brain adapts through memory and knows what to expect of events to come. Thus the passage from thrills to a more serene life.

Don't you think the taste of chocolate would be better if you didn't remember tasting it ever before?

What was, still is, and always will be such is the truth of the eternal now.