I have a few bags, for varying purposes:
Condition 1 "Tactical Deployment Bag" -$15
Great little EDC pack to keep in my truck, loaded with all the usual stuff I might need in case of emergency: Flashlight, paracord, sharpie/pen, tide stick, tire gauge, "survival" knife, pocket knife, leatherman, razor blades, lighters, allen wrench sets, Plhilips/flathead screwdrivers, sweatband, hand sanitzer, tissues, q tips, flask, latex gloves, condoms, alcohol swabs, advil, Vitamin B, couple snack bars, and I think a few other small items Im forgetting. Only downside its the storm flaps make the zippers hard to manipulate, flip them back and its fine. Great buy for $15, sometimes marked to $10
Drago "5 Day assault Pack" -$56
Big open spacious backpack, took this one to the East Coast for a week as my main carry on, and the little bag above. Fits a tons of shit, and unfortunately more then the bag is rated for, the stitching on this bag isnt great, the shoulder strap has started to pull out about 1/4 of the way on both sides, the straps lack cushioning which makes it uncomfortable fully loaded too, the removable waist belt doesnt fit small frame people (5'9" 150lb athletic build). For light everyday stuff this is a good pack to throw clothes, jackets, and couple snacks in. Until it gets repaired, not using the pack for on the go. Bag does hold alot and easy to access most of it, but def on the lower quality scale.
Red Rock "Large Assault Pack" -$49 (MSRP $69)
Picked this one up as a intermediate between my other packs, at the swap meet for $49 with a ghetto hydration bladder. About half the size of the Drago, and fits almost as much. Much higher quality, better padding, everything fits. Comfortable even with 30 pounds of gear, a slew of compartments that are handy for everything and opens up all the way to access things at the bottom better. Velcro tabs on almost all the straps keeps them tied out of the way. It became my new EDC bag as well as for hiking. Not truly hydrations compatible as even the 2L bladder sticks out the back pouch, but it works. Good quality and closest to milsurp style and quality Ive seen for a decent price.