@ natsuko: Cute little house, I think you could take the landscaping to the next level very easily. The way you have your trees now is kind of detached from the house. They're seperated and kind of doing their own thing. Landscaping is best when it works hand and hand with the architecture of the building.
There's plenty you could do with your landscaping if you make a few landscaping specific goals. There are plenty of things landscaping can accomplish, like outline a walking path or accent the front of the home. Try making a pathway from the door to the street and then add a few flowers along the edge. Then, try making a few plots right infront of the windows.
@ Saltypaws: The desert terrain paints are a nice idea, but when you get to the edge of the lot there's that harsh border with the rest of the landscape that's very distracting. I'd suggest just going green as having a lawn in the desert is certainly possible. If you're really set on building in the desert, I'd suggest looking up Los Aniegos in the world exchange. It has an excellent desert region.
Anyway, while on the subject of the landscape: look closely at your plants and trees, specifically, look closely at patches of the same plant. Notice how they have the same leaf pattern? It's import to give little turns each time you place more than one of a plant close together, so that you don't fall prey to that eerie clone feeling.
I like the mission arches in front of the jacuzzi area, but I noticed you're using the same wall coverings as the rest of the house. I would suggest using a flat wall with a brick texture here to make it distinct from the main structure.
Moving inside, I have to say we've got some pretty good furniture arrangement going on, and some nice colors. your bathroom is spot on, with a solid color palette, good use of space and utility and fun accents. I'd suggest coloring the trim of the window the same color as the shelves.
In the kitchen, I would making the brick wall lighter and just a speck less saturated, so that it contrasts with the tiles better. Next, try applying the wood texture from your counter's onto that wooden panel on your washer and dryer. Using create-a-style on all the little bits and pieces is an essential part of making a color palette work. Finally, simply because the kitchen and the living room appear to have distinctly different color schemes and personalities, I would suggest putting an actual wall in between them, and using multiple mission arches like you did in front of the jacuzzi.
All around some good stuff here, with just a few things to touch up on. Keep on keepin' on.
@ Aussete: It turned out fantastic! Of course I always knew it would.
@ Vamp: A very nice house, but there are avenues we can pursue to make it even better. First off, I'd like to suggest you "unite" your roof sections. Your roof has a dimple in the very center, where rain and gunk would pool up. Multiple roof sections need to come together in a way that there are no insets. Long winded explanation for something very easy to solve. Simply drag the two "hipped roof" sections the entire way across, and then lower them to their original height.
I'm going to echo what I said to Salty about making small turns when you place the same kind of plant multiple times. If you don't, they'll appear to have identical leaf patterns and you getting this eerie sort of "clone" sensation.
For your interiors, very good furniture layout, although I'm noticing you're not using very much Create-a-Style. While its definitely possible to create a workable arrangement using only default styles, using CAS gives you complete control over the color palette. Now I'll admit CAS'ing everything can be a bit foreboding, but it pays off in the end. You just gotta grab the bull by the horns. You'll be glad you did in the end.