Depends on the shoot of course, but for a full day's creative shooting these are the common bags and boxes I have on board:-
Lowepro Vertex bag with 2xD8xx bodies; 24-70mm, 14-24mm, 70-200 f/4. Sigma 105mm macro, light meter, radio trigger. Many batteries. Many cards.
Induro C403 tripod and BH3 ball head.
3xSF600 in a 3-light vertical bag
Safari II in it's own case
3x650 Watt tungsten Fresnel spots in roller case
Stand bag with 2x2m and 1x3m stands
Boom stand and arm + 4kg counterweight
Small booms and reflector holders, and 2x pop-up 5-in-1 jobs
2xheavy stand and 3m telescopic background pole for hanging lights from, on superclamps.
2x30x120cm stripboxes with grids
1x120cm Octa with grid
5ft reflective brolly
5ft shoot-through
Long throw reflector+grid
Small beauty dish with grid
Aputure Fresnel attachment for Bowens/Lencarta fit
40x60 softbox
Large Lencarta soft studio bag with: 2x 1kW Fog machine (dense and med fog); small blower, wide blower (floor dryer), 3xBarn doors for 7" reflectors; gels (many gels :-/) Roll of Cinefoil; floor (low level) stand
Plastic crate: Speedlight modifiers - Flashbender 2 XL kit, snoots, grids, small lights (LED torches, Xmas lights, EL wire) and batteries (18650 and dedicated LiPo packs for various LED contraptions); Laser pens (red, green and blue); 3xSuperclamps
2x240 Volt 2m LED strip lights
1.8m RGB LED stick
Plastic crate II: Bowens mount E27 bulb holder with 2x150 Watt daylight balanced curly bulbs; antique style bulbs and cables; Laser generator, shiny gift bags; various transparent acrylic boards; Lightblaster
Large art board carrier bag with various sizes of black, and white foamcore board, and various cardboard "cookies" (Cucoloris) - sometimes mistakenly called gobos.
Small stand bag filled with rols of bling: various colours of transparent and foil backed Cellophane; rolls of silver radiator reflector.
1m collapsable silver ducting and 8xfreezer packs in cool-bag - for chilling fog.
Soft bag with fabrics - organzas, silks, voiles etc; 10x med A clamps; bag of C74 clamps (inverted wooden clothes pegs)
Spay bottles for water, water/glycerine mix; oil etc to achieve various skin reflectance
Laptop for relaying jpeg previews to.
This load varies! - if I know pretty much the shots I'm after, the kit list will be much smaller, but for all day creative shoots, I like to have as much tat as I can carry - for those (yeah that's working but now we need to add some glitter/lasers, sharks, sharks with frickin lasers moments). There's also towels, spare clothes (location shooting can get you covered in crap, or soaked, or both) and drinking water..
By contrast, my typical kit list for a commercial job will be almost nothing by comparison:
Events coverage: 2xbodies; 2xSB900 speedlight, batts, cards etc, Nikon 28-300mm superzoom (covers almost everything for lectures/presentations); 18-35mm; 85mm f/1.8 for the odd headshot near a window. I also use just the camera and on-camera flash to make headhsots - bouncing the flash off the ceiling behind and to the left with a nice grey wall about 3 foot behind the subject.
Environmental portraits (eg portraits with some office/workshop background): as above using 85mm but adding 1x Lightweight stand, 1x med shoot-through brolly, 1xLencarta triangular reflector with hand grip. YN622N/TX radio gear for speedlights.
Both of those kits fit in,and strap-to, my Vertex bag