I didn't really get into the first one and so never bothered going back for any of the other installments.
Seemed to get very repetitive, very quickly. Go to town, climb tower, identify missions (of which there were only 3 types i think?) and then repeat.
Think i went to each of the 3? towns once, seemed alright in a getting to know the game sort of way but then as soon as i revisited one of the towns, more areas had opened up for climbing/discovering, i'd had enough.