Yeah, I do regret that some games just aren't as good as they should have been. From my recent postings, you'd notice that Operation Logic Bomb falls into this category. Others as well.
Can't really get into some of Nintendo's early NES games - Zelda to a degree, but certainly the original Metroid. Still great, groundbreaking games, but I'm kinda "eh" about the whole affair. They get love because of how early and inventive they were, but the actual execution isn't quite up to the standards of later games.