I to have angels nad loaches and love them all. But if I had gotten aa chance to make a 3rd choice it would have been the danios. I use to have a 29gl tank with 27 danios (various kinds) in it and I loved it because it stayed soooo active all the time.
I can't vote for only two! I love all fish, seriously. To me, every species is beautiful in its own way. If I had to name some, I think the best would be angels, rams, gouramis, neons, danios, rasboras, barbs, glass catfish (!!!), all the little minnows and rainbows, lol, um ... and so on