I really like Over Hill and Dale because it nicely balanced the roads with the hiking mechanic
Yeah, I've only played it a dozen or so times but the hiking mechanic has been hugely enjoyable (though Im primarly comparing that to my 1000+ plays of H&G rather than my 2 of base Carcassonne).
Can really balloon your score, in a 1v1 both me an my oponent got onto the same road early, and all bar 1 non-ending road tiles got placed on it over the game and used to hike becuase neither of us wanted to shut it down! I ended up with a score of 269 and I think about half of that must have come fron that one 20+ tile long road and associated hikes!