Thanks for the replies.
I've played with the Brenizer method, creating something like 20mm f0.3 shots (originally shot with 85mm @ f1.4) or whatever they were
It's not the DoF - I noticed the effect the very first time when someone posted some photos of a newly purchased FA 50mm f1.4 - there was a certain and distinct "pop" to the photos that I hadn't noticed before with other lenses. Thinking it was the lens, I went ahead and bought the same lens as well but after many tries, wasn't able to get that "pop" look.
The earlier mentioning about using a HDR tool to achieve this is right on the money, or at least I'm getting results much closer to this look now.