Why Capital Markets?

I've read a lot on this site about why an industry/coverage group is better than a product group (capital markets) for IBD. On the flip side, why would one want to work in Capital Markets (e.g. DCM, ECM, Asset Based Finance, Project Finance, Leveraged Finance, etc)? What are the pros of Capital Markets, and what sets it apart from other businesses (S&T, IBD Coverage, Asset Management, etc.). I ask this particularly with Morgan Stanley (GCM) and Citi (CMO) in mind.