I want something awesome, and unique. Something that stands out.
I want something modern, and maybe abstract as well.
The logo can tie in to real estate somehow, or be completely abstract.
You can add a house/castle to the logo if you want. But don't make it too literal.
Sometimes castles can look cheesy. Try to avoid that and make it cool. No flags.
Make it a little different, interesting, and clever.
I don't want it to look like a typical real estate company logo. Remember awesome, unique, modern.
Color wise, I like blue or green themes (not necessarily together though). I am open to other colors if you think they look good.
Here are some designs I like from other competitions:
A lot of designs have "Castlecliff" in large font, and "Real Estate" in a small font below, centered, with a horizontal line on both sides of "Real Estate". I'm not a fan of this. It seems to look too much like every other logo design. Keep it fresh!