Okay, I've gotten a couple of requests to show what I'm currently running so here goes:
First Line GearSo, I always advocate having a separate belt for your first line gear. This is what you put on first and take off last, whenever possible. You can take a dump simply by taking off the belt and you can take off your armor without being unarmed.

Left to right on the belt:
-Medium Maxpedition roly-poly as a dump if needed
-Double synthetic pistol mag pouch
-Double nylon pistol mag pouch
-Suppressor pouch
-Blow-out kit (just for gunshot wounds--not a general med kit... more on this in a second) on Jone's Tactical tear-away panel
-HSGI drop-leg /w Peter's Custom Spada holster. Holds my G17 /w TLR-1
-Mag pouch holding a multi-tool on the HSGI drop
Firstly, although the blow-out kit appears to hinder the draw of the pistol, remember that the waist is an oval shape. It doesn't hinder the draw at all.
I keep the blow-out kit on the first-line gear because I'll always have it on (unless I get shot while taking a dump, which means it'll be nearby). The blow-out kit sits in a 5.11 medical pouch on a Jone's Tactical Tear-Away panel. The tear-away panel is great so that whoever is working on you can just rip the whole thing off instead of trying to work with the kit while it's still attached to you.
I keep a general medic-kit inside my bug-out bag. No bullshit band-aids in the blow-out kit. The blow out is for just for GSW's (I know I've said it before)
Ripped off and open:

Contents:

-Two Tourniquets
-Burn gel
-A shitload of gauze pads
-ACS chest seal
-Quickclot
-Latex gloves
-Hand sanitizer
-small ace bandage
-gauze
-gauze
-gazue
-gauze (anyone else see a trend?)
Second Line GearNow, depending on what weapons system I go with, I have separate plate carriers (AR & AK).
Here's my AR plate carrier setup

second view:

It's an HSGI Weesatch plate carrier. It sports internal pouches to hold up to 8 AR magazines and two internal admin/whatever pouches which radios and water bottles fit really well into. For my primary reloading, I have a triple-shingle on the left hand side (for a total of 11 mags). You can see some medical shears in the middle and on the right side I have a general BS pouch (holds maps/cellphone/pens/GPS/spare safety glasses/tobacco) and a smoke grenade pouch just to the right of it. I have a Source hydration bladder that runs along the back
[url="http://www.youtube.com/watch?v=yyF36M1mz-w"]http://www.youtube.com/watch?v=yyF36M1mz-w[/url]
Here's my AK plate carrier setup

Base is a Blackhawk STRIKE plate carrier. There are two sustainment pouches on either side (remember how I said that extreme left or right didn't matter?). Nalgene bottles etc fit well in these, also NVG's. On the left hand sustainment pouch I have a double-pistol mag pouch. This is not for primary reloading but to backfill the magazines on my belt. The AK pouches on the chest I absolutely despise. I'll be switching them out for (8) HSGI taco pouches in the very near future. This rig is really secondary/training as I don't plan to bug-out with an AK if I can avoid it.
Low-Pro Rig
Another view:

This is a Tactical Tailor single piece MAV. It sports (6) HSGI taco pouches, a triple mag pouch, and a sustainment pouch. Once again, the pistol magazines are for back-filling. What I like about this rig is that I don't need the drop-leg because no armored plates are involved. I use this rig as a low-pro rig
and a competition rig. The HSGI taco pouches will hold anything from an AR mag to an AK mag to a Saiga-12 magazine and still offer good retention

Obviously, I would never carry such an assortment of magazines in a real situation. This picture serves to show just how versatile this pouch is.
Final CommentsI didn't just make this stuff up. All of this comes from many years of carrying heavy shit in combat situations Years ago, when I was in Iraq, I probably went through a dozen gear configurations. However, the basics that I outlined in this thread rang true.
Here's a pic of my gear in Iraq (I'm on the left)

It's rough but you can see that I have (3) 4-mag pouches on the left-hand side. I used a SAW pouch as a general admin pouch on the right side with my medical kit on the far-right. The pouch just above the SAW pouch held a camera and some other BS stuff I didn't use very much. Notice that there isn't shit above my magazine pouches to impede the draw of the magazines.
Also notice that I'm wearing a separate belt for my pistol. You can see the regular old riggers belt on my comrade to the right twisting from the load of a simple dump pouch on his left hip. This is one of the reasons to keep your shit on a separate belt.
Another pic (I'm on the right in this one--dig the burned out bus in Fallujah)

This is a pic where the pouches on the right are obscured by my rifle. You can see that there isn't anything of significance over my mag pouches--just some map pens and an AK bayonet used for prying (You wouldn't believe the shit I broke into with a simply bayonet used as a prying tool)
At the time, you may notice I was carrying 15 AR magazines on my person (12 on the vest, 2 in the gun (on a mag coupler) and the 15th on the buttstock). Once again you can see the separate belt (I didn't have a pistol in this pic because that POS M9 lost some springs and got sent back--this was a day before I got a captured BHP) for a dedicated dump pouch (I don't use those anymore--good to free up the legs) and a knife).