I use to love IndyCar, but then found F1. I feel like IndyCar has taken a step back and their new aero kits are ridiculous. It seems the fan base is not as large as it use to be, but seems to still be a decent following. I would love to see more manufactures involved in Indycar and some new tracks that they do not go to currently. The oval racing is not interesting unless it is the 500, but that is my opinion.
Now that I watch F1 and then see IndyCar, F1 just seems way more interesting, faster, better tracks and better cars.