Designing logos is not a specialty but branding is important and the choice of a logo should accomplish a lot of things. It should be immediately clear what the company's about so I generally like logos that use the company's name. Also, the style sets the tone for whether it's highly corporate, slick and high ticket items, or fun things like games. I have worked with full time graphic artists who have produced excellent logos, like the new one for Imperial Wars but here's some of the ones that I have designed. Logos are always a difficult birth.