I want someone who values faithfulness, loyalty and honesty as much as I do. I don't need them to fall in line completely with all my views on everything; I'm a fairly open minded ISTJ. As long as they respect my stances and opinions and share the same basic values as me that are necessary for a good and healthy relationship then I'm pretty open with the rest (not saying there won't ever be debate though ). I like compassionate and warm/sincere women, optimistic and spirited (but not in an "I'm going to suffocate you with my spiritedness !!!" way).
A level of physical attraction is important to me. There are a ton of cool people out there that I could be compatible with, probably, but being physically attracted to them is an important element for me in a intimate/romantic relationship.
Ambition is another draw. Doesn't need to fall in line with mine necessarily, but it's always cute when a person is driven and compelled towards something - a hobby/ies, a study/ies, something like that.
Sense of humor that fits with mine. I don't laugh at a lot of conventional humor, so it's nice when you're with someone that "gets you".