No one likes bagging leaves. It is a lot of work to collect the leaves and then put them into bags. The bags are expensive and the increase in garbage is huge.
You save money on plastic bags and mulch.
Instead of bagging leaves, buy a leaf mulcher - they are the best! It is like a vacuum cleaner that mulches up the trash. A leaf mulcher sucks up the leaves, mulches them, and dumps them into a reusble bag. After you have mulched them, you can take the bag and empty it directly into your garden. Leaf mulchers are so great that I can run mine over my existing bark mulch at top speed and it only picks up the leaves. Love it!
You save the environment by not buying more plastic bags (plastic is evil) and not creating garbage. You also don't need to go buy bagged mulch at the garden store.
You save money on plastic bags and mulch.
Also, it is much less time consuming that trying to manouever leaves into bags.
For leaves that fall on the grass, just take your lawn mower over them, mulch them up as you go, and leave them on the grass just as you would do with your grass clippings.
Plus, I have to confess it's fun to do my leaves. I love my power tools and this qualifies!