I have been in a few long-term relationships over the years with amazing, handsome, successful, intelligent men (the last being about 5 years long and ended 2 years ago). Of course, we weren't the right folks for each other or heck, I wouldn't be here! I have learned tremendously from each of these experiences and I'm excited to see what the future holds. A key conclusion I've derived from this is that while I'm relationship oriented, getting to know someone well prior to jumping-in is paramount.
I need the following qualities thrown into a pot, stirred and molded into a man: Intelligent, handsome, caring, enjoys some combination of gym time and/or run, bike or swim, good communicator, is a good friend, positive attitude, seeks to understand, has compassion and empathy for those that haven't been as fortunate... The list could go on, but in reality I could only ever articulate 50% of the qualities that result in attraction. At the end of the day, the relationships I've been in have just happened because they were meant to be. It didn't require a lot of thought, force or analytics. It just happened easily. I expect the same will occur when next it happens.