I've done a TON OF DIY projects in my lifetime. Decks have been probably my favorite with the largest one being ~2,200 sq/ft.
With that said, we all know that time is a finite resource, and as much as I enjoy building things and seeing the fruits of my labor once completed, there are just many more things I'd prefer to spend my time with rather than building something that will only require more of my time in the future to maintain it.
Things in order I'd prefer to spend my time doing:
1. Kids
2. Family
3. Traveling
4. Exercising
Everyone is different. I suppose if you were retired and alone, and loved building things, building a deck would be a better use of your time than a person such as myself.