I think it's finally safe for me to post in here, as I think I've finally found the MacBook for me.
I bought the MacBook Air 11" in August. I loved the form factor, but then had a need to run a VM or two. This brought the Air (with 4GB) to its knees.
Then the new MBPs were released. I immediately sold my MacBook Air (new enough so minimal loss, thankfully) and got the mid-grade MacBook Pro without much thought. If 16GB models were available locally, I would have bought it, but alas I have a problem with patience, and figured I could get by with 8GB.
Then I had a need to start using the MacBook for work purposes, prior it was just a personal machine. More VMs required, sometimes running simultaneously. VMs that require 4GB of RAM each, unfortunately (Windows + Visual Studio 2013 and various other tools all running at the same time). The 8GB 13" MacBook Pro couldn't handle this very well.
So, I sold this machine late January (luckily once again for minimal loss) and bought a 15" MacBook Pro with 16GB RAM, 2.3ghz i7, 750M, etc. at my local Apple store. I would have purchased another 13" model, but they don't offer 13" with 16GB locally anyware, and this 15" model was available immediately with a short drive (again, horrible patience issue). This handled everything perfectly. However, I'm a very mobile person. I should have handled it first. No amount of research/reading about them can make up for actually holding them. I did the store pickup option through the online store, figuring it would be OK ... it's only a pound heavier, right? I used it for a week and returned it, the thing is just too big compared to the 13" models. The weight wasn't a problem, the size was just too much for me. The 15" feels like a regular / full size laptop, the 13" feels more like an ultraportable to me. I returned the 15" to the Apple store for a refund (no loss this time).
Last Thursday, I ordered a 13" MacBook Pro from B&H (a trustworthy authorized reseller IMO). They stock various 13" models with 16GB RAM and could overnight it to me (have I mentioned my patience issue?) So, I now have the 13.3" model again, with 16GB RAM, 2.6Ghz i5, and 512GB SSD. It runs all the VMs I need simultaneously, it's powerful yet compact, and I do believe I'm (finally) happy. Until Apple releases a 13" model configurable with 32GB of RAM. Ugh.
Bottom line: Happy now, seeking out some patience therapy.
WP/Nick