For many people, larger fish tank are easier to care for...
A larger volume means more water to get the temps, nitrate, nitrite and ammonia in check! It also means that if you have some territorial fishies, the others can easily get out of the way and there more space for the fish to move away from the bullies! And if the power goes out, it will take longer for the temp to drop as it is a bigger tank - or a more gradual drop - and if you keep it near a window or somewhere wear temp fluctuate, a larger volume of water will equal less fluctuation!
A larger volume means more water to get the temps, nitrate, nitrite and ammonia in check! It also means that if you have some territorial fishies, the others can easily get out of the way and there more space for the fish to move away from the bullies! And if the power goes out, it will take longer for the temp to drop as it is a bigger tank - or a more gradual drop - and if you keep it near a window or somewhere wear temp fluctuate, a larger volume of water will equal less fluctuation!