I'm approaching 33, but I have noticed a slight increase in difficulty as far as staying in REAL shape as I've passed 30. I used to powerlift competitively but now am more interested in overall fitness.
I'm currently about 215, 12-15% BF. 5'11".
I lift moderately heavy, compound movements, 2-3x per week. Primarily bench, press, full squats, and rows.
I run a 5k 1-2x per week, and do a strenuous 10-15 mile day hike at least once a week at high altitude.
I eat reasonably clean, but if I am starting to lose weight I will pack in some pizzas, burgers, chocolate, etc to maintain calories. When doing cardio 2-3x a week I lose body weight very quickly.
All this and I'd consider myself in moderately good shape. Where I live, no matter how fit you think you are, there is always someone leaner, stronger, faster. Helps to keep it in perspective.