Just a reply to this thread in general:
I guess that I have had almost a completely different experience with Home Depot and Lowes than most posting on this thread have had. I live about 40 miles away from them (Lowes and HD are located about a mile apart). We've been in the process of building our house for about the last 2 years (we've done all of the working except the septic system ourselves - excavated, poured basement, brick, framing, roofing, siding, electrical, plumbing, etc.). A lot of our lumber came from a building materials supplier in the same town as HD, - cheaper and good quality. Almost all of the sheet goods and studs came from HD - lower than building supplier. Tools, windows, doors, lighting fixtures, ceiling fans - HD. Shingles, siding, etc - HD. Everytime that I have gone to HD I have left with a positive feeling. We went one time and spent about 2 hours putting together an order. I had a clerk with me walking around with the special order list, writing down quantities and SKU numbers, then we went to the contractor desk, verified everything and set up delivery. The windows that we got were all special ordered - came in with no problems.
Now in defense of you guys, for the most part, I know what I'm looking for so I don't have to have that much help looking for something. The few times that I have needed help, I've found the folks at HD to know their store very well and the've directed me to the right spot.
My wife and I have commented several times that building the house would have been much more difficult without HD. There is a local building supplier less than five miles from the house, but their prices are sky high and they have a tiny stock of anything in house (but oh, they can get it for you). Their prices for Andersen windows were almost double HD - for the same models.
I do buy most of my plumbing and electrical stuff at a local farm/hardware store, where they do have a "can do or can get" attitude (I've been going there for years and years and years and their customer service is excellent and prices are comparable or below HD for plumbing/electrical stuff).
Maybe we are fortunate and simply have an uncommonly well-stocked, well-staffed and well-run Home Depot in our area. I'll be sure to update you guys on my future dealings, as we are getting ready for another big trip.