I regret buying a house. Not only because our home is currently worth less than the remainder left on our mortgage. Not only because when we purchased, I had ignorantly assumed an 8% annual appreciation on my real estate investment in perpetuity.
But I regret buying a house because of how it realistically locks you down where you are. Whereas, renters are completely mobile. Ready to jump when opportunities present themselves. Owners aren't stuck, but it's definitely harder.