I went for Heero. He's scenic, he doesn't care what you do as long as you don't annoy him, interfere with his missions, or touch his laptop, and you just know that you'll score major cool (and scary) points just by being willing to sleep in the same room with the Death Glare Kid. Plus I could probably get some major assistance with computer problems and/or annoying neighbors by helping him with the little problems of life like distracting Relena. XD