I find early on I can mulch the leaves but once larger drops happen it depends on the property. Sometimes it turns into a bigger mess but I have lawns (only a few because my focus is on landscape) where they look just fine from mulching. I found I could mulch them up and then put the bagger on collecting more in less trips. Maybe it takes about the same time but it's less volume if I haul away.
I ended up finding a very old but well taken care of leaf loader for cheap (I'm talking old enough no parts are available). It helps on two properties where the leaf drops are quite large. It's no brand new billy goat loader but saves time. I see other guys around me use lawn tractors with those towable leaf loaders for their clean ups. I think they finish mow with their regular mowers but the lawns are spotless when they are done!