Generally speaking, which season usually has the most good anime? Alternatively, which season usually has the worst?
Winter and Summers tend to have the most anime release, that's also when the best sellers happen.
Summers typically have less than other seasons by a fair amount.
Winter is usually the worst from recent memory.
Fall is usually when all the blockbusters come out, and Spring is always shit.
With Summer and Winter your mileage may vary.
Summer has the worst threads.