180 gallon is too subjective. My 150 tall is just as monster as any 180 if impact and scale are yardsticks....I also believe stocking has an impact although a 300 gallon tank with nothing but small tetras is more monster than a 125 with Peacock bass in my opinion!!
100% agree with you on that one my 150 tall is a beast. the top of the tank on the stand is about 2 ft away from the ceiling LOL