Until recently I've never been a tactical sling user. Reading and learning here made me realize I needed to address this shortcoming. My slinging needs are pretty lightweight compared to many here since I'm not an operator.
kwrangln infected me with Boonie Packeritis. Here are three of my carbines with variations of the basic $16 Boonie Packer TQA quick adjust two point sling:
KISS with M4 stock connector - the front is mounted to a M4-type side sling point. This is a 1.25" version. Simple, effective, comfortable.
A MOE carbine with my WECSOG front sling loop. It's a 1.5" model with the M4 stock connector, I used a MASH on the front. A very quick, comfy, stable sling!
Here's a 1.25" TQA to which I added 1" HK hooks front and rear to make a basic 1/2 point convertible. Same front sling point as the other MOE, Magpul ASAP on the rear. It works a lot better than I expected it would in both evolutions, I'm very happy with the results, and I think this version is my new standard sling for ARs.