I feel here are positives and negatives to being older.
The positive is a depth of experience. An inherent patience to work through problems, looking for the right answer. My boss can - and does - tell me "Laura, figure out XYZ and see if we can use it in our company." This will keep me busy for extended periods.
While it's not strictly age-related, I find many "younger" companies have views on work/life balance that are incompatible with my own. I do not eat, live and breathe my work. When I go on vacation I go, and make damned sure I'm out of cellphone coverage when I do.
Also, many "younger" companies have messages I do not believe in. A prime example is local media darlings HootSuite. Since I don't buy the problem, I can't be part of its "solution".