These are what I carry...
Firstly, there is a Veto Pro Pac. It has a shoulder strap, but I took it off as I generally don't like them on larger/heavier bags. What I do like about bags in general & the Veto in particular is the upright tool storage that makes finding a given tool much easier than digging through a damned box! The Vetos are very nice and very expensive.
I use this bag as my go-bag. I can do quite a lot with just the contents contained herein:
The second bag I unload contains the cordless tools & accessories I use most frequently - a hammerdrill, an impact driver & a flashlight. In addition, there is a 24" level, some wrenches, etc. Every bag I own contains a quality multi-bit screwdriver, an Olfa knife & a tape measure.
The third bag is for electrical repair essentials. It contains the 4 screwdrivers most used in Canada - a 1/4" flat, #2 Phillips and #1 & #2 Robertsons - and a 5/16" nutdriver in addition to some Stripmasters (the only way to go!). Then there's straight & bent longnose and linesman pliers, a pair of dykes, a tapping tool, a non-contact voltage tester and a 6" adjustable...
Most common electrical issues are solved with the above, but if I need more tools I bring out my dedicated electrical bag which contains the less-commonly used screwdrivers, meters, more testers & hardware...
There is also another identical bag to the cordless bag above that holds the less-frequently-used cordless & hand tools.
Of course, there is then dedicated plumbing, mudding & painting kits, but they are all contained in boxes. And then socket sets, power hand tools, table & mitre saws, and on & on!
