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
Good decision!
I went from an 2011 13" MBP to the 15" rMBP shortly after launch, tempted by the retina screen. After few months decided to sold it to buy the 13" rMBP size (first a max out 2012, now a max out Haswell 2013) since like you found the 15" too big. The 13" rMBP has the right size, power and portability I need!