He's growing all over the place and he does put on a gorgeous display in the spring. Problem is he doesn't bloom again and just gets covered with black spot and crud and looks atrocious the rest of the season. He's hard to get rid of too. So I'd dig him out now and get something you'll love instead.

Well, I toured the lovely garden of the president of the London (Ontario) horticultural society on Saturday as part of my local hort. Society's bus tour. It was beautiful. I got quite excited when I saw a Hosta resembling the one of mine I have been trying to positively ID. Asked the home owner which one it was but he didn't know :( but then a friend noticed a tag hiding under a leaf. And it said Fat Cat! Here is the picture of Fat Cat in this garden on the tour. Oops, the PIC is on my cell phone. I will post it in the next comment.

IMHO, the way to cure a houses identity crisis is not fight it, but let it be what it is! Which in your case is a handsome solid-looking midcentury modern... or lets say within the genre anyway, if not a prime circa 1959 specimen. Definitely has that cool ranchy kind of look and a lot of current fabrics, doors, furnishings, color palettes etc are straight out of MCM which means they would fit right in with your house. Not that you want to go over the top with making it into a time capsule or shrine to MCM style, but just let it influence/inspire your choices. This door fer instance : http://www.homedepot.com/p/Builder-s-Choice-36-in-x-80-in-Atlantis-3-Lite-Clear-Glass-Painted-Fiberglass-Prehung-Front-Door-with-Brickmould-HDX162460/204843729?&cm_mmc=Shopping|THD|B|0|B-BASE-D30+Doors|&mid=ex1mxG05|dc_mtid_8903vry57826_pcrid_73667292101367_pkw__pmt__ Sorry, but adding early 1900s craftsman brackets and other elements would add to an identity crisis, not cure it .... As for color, people were not afraid of color then! OK, so you might not want to go vibrant brick red, or avocado green, or chocolate brown but even if you prefer something more contemporary, ie really grayed out or neutral, at least go darker and richer to give it a more solid look as well as fit in better with your beautiful woodsy natural setting. Re symmetry, agree its not necessary..... but it should and I think does have a well balanced look. as I recall from (long ago) design courses there is formal balance and informal balance - both are good, and again I would just go with the original design intention.... if it works, why mess with success? The garage on left nicely balances window arrangement on the right, IMHO.

Not sempervivum. They have different growth pattern, and also cilia on margins. Mature plants could be as crowded, but usually, there are many chicks that are smaller. IMO, Echeveria. It looks like it has been deprived of light recently - center of each rosette (newest growth) seems to be too light. But maybe it is the photo. In either case, make sure you acclimatize it to better sunlight. Repot into bigger pot or separate - and post pics again in a while to see if the color changes. Blooms would also help to ID.