I’m pleasantly surprised. After the train-wreck that was Assassin’s Creed III (and I heard that AC Brotherhood was about as much fun as a sucking chest wound), about two hours into the fourth one (pirates!) I’m happy to say that the fourth iteration doesn’t suck.
AC I – Okay, but grindy and mostly the same after the first few hours.
AC II – I played the hell out of this.
AC Brotherhood – Stay away.
AC III – I wish I had never played it.
AC IV, Black Flag – Looks promising. The controls are a bit sensitive — I find myself leaping onto crates and climbing walls when I want to stealth — but on the whole it’s fun.