It is. I really won't fly anything but Delta for pleasure and most business (will fly SW for business occasionally if it's an intra-state flight up to SAC or the Bay Area), so having access to the airline hub definitely increases flight selection.
Racking up business miles to use for pleasure trips adds to the equation. We are headed to WDW in 3 weeks (I know, it's gonna be hot, but we get hot here and at least it isn't too muggy) and I'm using miles to pay for two tickets and a companion pass for the third. Total cost: $72.