I have said this on various places through out the forums over the past year or so. Nevertheless, I wish I were an ENTJ. I came to realize this after I went through heavy trials with one of my ex's, who happened to be an ENTJ. I realized that a huge piece of the attraction I had to him, was that I actually wanted to be him (not completely, there were some not so bright spots there).
I try so very hard to make myself as efficent and logical as possible and I have pushed myself beyond my capacity many times in the past. I know better then to be someone I am not but I am powerless to stop trying in a lot of ways. I find ENTJ's to be fascenating individuals. Very efficent, logical, clear headed, determined, unwavering, yet still understanding and deep. All of the things I look for in another, and all the tings I aspire to be. I know its terrible to think this but I am often at war with my emotions and I very often just want them to go away or go on vacation because they just get in the way of what I want or need to do most of the time. I can see what needs to be done, but I can't act on it in the best most efficent way possible like an ENTJ can usually.
It's for all those reasons (and more that I can't really explain) that I wish I were that type. I am confortable with who I am, don't get me wrong, but it's not where I want to be and I have come to terms with that. As such I am likely defaulted to find someone romatically (eventually, I have taken a hiatus from relationships until I am in grad school) to fill these holes. And it's my hopes that I can fill the emotional holes for them. That is one thing I do like being about an INFJ is my understanding of human emotion and the subjectivity of it (which is something ENTJ's do lack).
ETA: I often wonder if who you want to be is what you are always going to be attracted to.