t. never played any of the games
1 was repetitive as fuck:
tail this guy, listen to the conversation, kill him. Now do this exact thing 11 more times.
2- this was the best, no repeating bullshit like 1, great story, good mechanics, well polished. Will always be my favourite.
Brotherhood- just 2, but in Rome. Not bad,not good.
Revelations- pretty close to being as great as 2, if the player wasn't so OP with bombs then it would really be up there.
3- "WHERE IS CHARLES LEE" and edgy Connor's daddy issues. 0/10, into the trash it goes.
4- the boat stuff is fun, otherwise it's quite buggy.
And i never have bothered to play the rest because they are absolute dogshit.