...as a 'hands on' field engineer/technician/installer/grunt for a large defense contractor, I too have tool bags...a small personal bag, a larger travelling case, and being that I have a nearly unlimited tool/lab equipment purchasing budget/authority, some well stocked 'roll-arounds'...we have some pretty cool 'stuff'
I'm a frugal Scots-Irish bastid, so we don't buy a lot of 'funky' expensive tools, but we do buy a ton of good quality tools, and I do a mental 'price vs. value' evaluation of each purchase, and compromise where possible to maximize the value of our purchases.
(Being a 12 year employee of an employee owned company will do that to ya...lol)
So, I know hand tools, I think...
That being said, ya just can't beat a good multi-tool! I only wear mine at work, (that's the only place I wear pants and/or a belt, so that makes sense..lol).
I'd suggest that you buy a smaller high quality tool and carry it with you daily for a bit...you may end up wondering how you ever got by without it!
If you like it, you can always upgrade. I did.
p.s. Gotta love that Scallion!