I'm sure you've heard it said before... "Use the right tool for the job"
If you do electrical work you'll need tools for that. Having the corect size wrench is important too.

Wood work? Yard work or landscaping? General household repair?
How big is your tool box TL? (Not that size matters at all...)
A jewler might have a small tool box but a tree trimmer might need a tool box the size of his truck...
The job will determine the tools you need...