I am one of those who grew up in an age of nine planets, with an associated "mnemonic device" (a thing that helps you remember a thing) to help with remembering the names and order of the planets: "My Very Educated Mother Just Served Us Nine Pizzas". So my "feeling" about Pluto is certainly emotional, not scientific. If one examines the data however, Pluto does not fit very well with the rest of the "terrestrial" planets (Mercury, Venus, Earth, Mars) and it certainly is not a gas giant...so what is it? The discovery of Eris and others beyond the orbit of Pluto, sealed Pluto's fate, I am afraid. But remember, this is not the first time that scientists have reworked their catalogue of planets of the solar system. In an 1899 article in the Monthly Notices of the Royal Astronomical Society, there were 15 new planets reported to have been discovered in 1898, with Eros as a major one! Even at that time though, these were called "minor planets".