dont ask me I hate most of the sites I use. I like this site a lot, it simple and clutter free and its easy to use.
As a shamless plug however try
www.screwfix.com
We take a huge percentage of all our orders through the site so it must be doing something right. We won an award in 2003 or 2004 ( I cant remember ) it was the ECMOD award for best online retailer website
I also really like my banks website
www.firstdirect.co.uk