After having recently worked out my full pre-enthusiast park visiting history, I've ascertained that my coaster count overtook my age when I rode coaster #8 at age 7. This was Treetops at Oakwood Theme Park on 24th August 2010. My count has kept ahead of my age ever since, and seeing as I'm now on 102 at age 20, it's going to stay that way unless I live to a remarkable age and never ride a single new coaster again (which is phenomenally unlikely!).
My park count overtook my age when I visited park #10 at age 9. This was Universal's Islands of Adventure on 29th August 2012. My count has kept ahead of my age ever since as far as I can tell, but seeing as I'm currently on 22 at age 20, it's plausible that my age could overtake again if I drop the ball in terms of visiting new parks for a couple of years.