I tend to idealize one or two people at a time, one person who "gets me" and its based on a mutual indentity, we have to share a lot of common ground. I also will idealize someone who is superior to me, more dominant than I am, someone I consider "togther". (I usually will mirror traits in both these people as well)

I do think I have some say over who I idealize, but not in the sense I go out and look for them. It sort of happens, so some of it is subconsciously, but I don't lie to myself and idelize people who dont fall into the above criteria and obviously not everyone will fit into the criteria. lol. Does that make any sense?