I'm a really big fan of Harvest Moon, but honestly, I thought ANB was one of the least interesting ones. If it helps, I'm in Spring of Year 3, I've been married to Neil for about a week, and I completed the last TRP shortly before that.
I actually had fun with the game until I got to the last 2 TRPs. Unlocking everyone and everything was really pretty fun, as was getting to know them and seeing all the heart events. I started getting bored pretty early, though, and usually I can barely put HM games down, but since NL and Pok?mon XY were released around the same time, I kept leaving ANB for those, even after I'd mostly finished them. I think I ended up having to force myself to work through the last 2 TRPs.
One of the bigger problems I had, too, was the courtship system in ANB. I wanted to meet all of the bachelors before I decided on who to give the commitment ring to, so by the time I'd gotten through with Amir and Soseki's events, I had everyone else at red and pink flowers, mostly from the festivals. Even after that, I had trouble deciding, since you can't really find out much from 2 heart events, but I ended up choosing Neil. Even though he's a cutie in his pre-relationship events, he turns out to be horrible in some ways afterwards, but since you need a purple heart to break up, I was sort of stuck, so I ended up marrying him.
I haven't really had to deal with it yet, but I also think it's sort of ridiculous how many animals you can own. I have a full chicken coop and a full barn, and it takes up quite a bit of my energy with just those 2. I know you can use multiplayer to take care of your animals, but I'm usually not at home when I play, so it's sort of a thing where you have to choose between being able to play your game away from home or having a super efficient farm.
I'm hoping for more from CtaNW, but I dunno, maybe it was just that playthrough. I might try to attempt making a second file in the future so I can give it another chance.