This is how I do it, also I think same as option #1 in Artwo's post. I'm primarily a spinner guy, but have branched out into the bobber game a little over the past few years (mostly just for variety, but also to be able to target a few particular spots more effectively) and this is what I've settled on for the majority* of situations since I'm not devoted enough to have a huge library of different bobber setups.
My choice for leader is usually just 10-12# mono, so unless I do something egregious like wrap the mainline/bobber around an unfriendly branch

palm

I'll almost always break the leader instead of the 30# braid and get my bobber + inline weight back from a simple bottom snag. I usually also run a small split shot about halfway down the leader between the inline weight and the jig head (either an actual jig, or a jig head w/ either pink worm or a bait/yarn rig) so it'll help track more vertically in the water column rather than having the jig 'swing' up behind the bobber in faster current. For length, you don't want the leader too long so you can run the stop all the way down when targeting shallower spots; I used to run longer but have graduated towards only a couple feet now because unless you ditch the inline weight you can't shallow it up any further but you can always just adjust the stop to run deeper. When I tried running a longer mono section and just using more add-on weights like extra split shot, I'd sometimes end up with the braid/mono splice above the bobber so that you end up w/ a section of mono laying on the surface instead of all braid, which doesn't work as well for mending, etc; or you'd have the knot splice hang up trying to slide up/down the bobber.
For bobber choice, I've become a fan of the Aerofloat line ~ much cheaper than Thills, still plenty durable, and they have metal grommets in the ends so the braid runs through them pretty smoothly w/ no fraying. They also print the size on the side so it's easy to match to the proper weight rating once you have several of them floating around loose w/o the packaging. And, they come w/ a couple beads & a pre-tied bobber stop in the pkg, plus they're available even at smaller places everywhere like BiMart so you don't need to hunt down a bigger specialty outfit.
* - The 2 main exceptions to the above setup would be 1) low/clear summer water where I do choose a longer leader or even straight mono over braid mainline for stealth, and then just a round fixed cork float w/ no extra weight besides the jig alone; and 2) "wind" drifting in flat water out of a boat where fish may stack up for long periods, where we use a much heavier rig like for salmon (huge foam bobber w/ sliding egg sinkers) so that the added mass will kinda hold its place in the water column more and not have the breeze put too much of a belly in your line and start dragging the bobber around out of the zone too quickly.