If an attackers sets out to crack the symmetric key of e.g. AES-CTR, would they prefer to have access to many small cryptotexts or one large cryptotext? I.e. is it more interesting for the attacker to see cryptotexts of many IVs than of a single IV?
Does the answer change if also the plaintexts (many small, possibly similar, plaintexts or one large) are available to the cracker?
Does the answer differ per (approved) crypto algorithm and mode?
I assume perfect implementations, IVs etc. but assume nothing about the properties of the plaintext, except that the attacker does not get to choose it.
If these are too many questions, requiring too long an answer, focus on the first.