One of the "staples" of our office, and no doubt millions of others, is this Staples letter size note pad. Simple white paper with a double red line separating the margin makes for a common yet thoroughly enjoyable writing experience.
The paper is slightly rough (like bagasse, but made with the dioxin) and seems thin, but it's actually quite substantial. My Zebra Sarasa gel ink pen didn't bleed through, though there was a heavy shadow on the other side, so you might want to skip the back when writing.
The paper itself is a bright white, and it's actually a rather classy-looking notepad. The logo looks right on the khaki-olive color just underneath the blue top liner, giving everything a balance look that's not too weird or bright or garish.
If you use these, take a moment to really look at this nice little notepad. That it fades into the background actually makes it more interesting--it's not meant to stand out, what you write down is.