Star Fox Adventures hate is undeserved. It mostly stems from sour grapes that Rare left Nintendo nothing more. When it was new people loved it, then the Rare thing happened and suddenly the game sucked, then people tried to go back and say all Rare games sucked and were over hyped.
Star Fox Adventures is a really great game don't listen to the haters. The ONLY complaint I had was the ending, which at the time was the prevailing complaint but then like I said the Rare **** happened and suddenly it was a terrible game. Is it worth playing now, depend, it is an early GameCube game so it hasn't aged that well, the graphics are okay for what they were trying to do but the game really looks dated. The gameplay is mostly alright, the shooter levels do feel tacked on but that shouldn't take away from an other wise great game. It does have a pretty engaging story, complex puzzle solving, and some intense boss fights. Where it really fails is the voice acting can be really awful at times, the story falls apart at the end and the shooter levels really should have been removed.
I think if it had stayed true to just being Dinosaur Island and left Fox and company out, or Rare would have never left Nintendo, people would hail it as a classic.
As for Crystalis, that game is a mess. It starts out great, then it falls apart quickly. It's not terrible but you have to really want to make progress or else you just end up giving up. That is true for a lot of those types of Nintendo NES games though.
Neutopia is a decent Zelda clone but it is on a system hardly anyone even knows about let alone has. I think it was on Virtual Console but I am not sure.