It would be interesting, nonetheless, to swap notes about what species posters find exciting, and which they get blase about.
Amongst mammals, Black Howlers, virtually any colobine, a family group of gorillas, Giant Anteaters, Clouded and Snow Leopards, Asiatic Lions, Dholes, Indian Rhinos, Vicunas, Okapis, Bongos and Scimitar-horned Oryx were the stuff of legends in the mid '70s, when I was cutting my teeth, and I still get excited about seeing them now.
Conversely Rhesus and Pig-tailed Macaques, Vervets, Caracals, Brown and both black Bears, Grant's Zebras, Guanacos, Hog Deer, Common Eland, Blackbuck and Barbary Sheep are these days comparatively thin on the ground in the UK, yet because they were such a staple of zoo visiting in my teens, they don't tend to attract my interest.
Do other posters share similar quirks?