Ok, "celebration" took 31 days for me. XD
Before Sharptooth eats me, I will write some words.
I won't say obvious things why this sharptotoh can be easily considered as the most scary and dangerous predator in LBT, not affected by "sharpteeth stupidity" unlike others of his kind. He appeared in original movie, the darkest and the most serious one after all.

I love antagonists in stories, especially when they're perfect. This guy is at the top of my fav LBT characters list, on position #3. And even if I still considered Sharptooth as just some pure vile force that opposed main characters in their journey, I believe he still would be at the top positions in the list.

But gladly, I quite changed my opinion about Sharptooth during the years, and I think it makes him even better.

When I was a kid, and watched only original movie, I considered Shrptooth as some kind of soulless monster, pure villain. Just some evil force that can be only opposed. I watched a lot of cartoons where some wild antagonistic predatory animal was pictured. I was sacred of them and didn't try to understand their charscters. D:
And yeah, I remember I had nightmares, starring with our lovely Sharptooth.

Later, after I watched sequels, when I was at the age when I started to analize all characters in movies and books, including antagonists, I still considered him as evil creature who wants only blood. I understood that predators have to kill other living beings to survive, especially in universe of LBT1, where theme of survival in semi-apocalyptic world is main one. I remembered introducing Chomper character and his parents, the same type of sharptooth. I found out additional motive for Sharptooth - revenge for his injured eyes, I discovered this detail only after reading discussions. But. Still - I couldn't... no, I refused to see him anything but villain. The best, the scariest, and the most dangerous villain in LBT series.
And then...
One day...
I did read Don Bluth's analysis about Sharptooth. Right here on this forum.
And not so long after, I watched a couple other cartoons that contained some very interesting details related to its antagonists.
And after that - I finally changed my view of this character completely.
All these thoughts about his actions and motive. Simple hunt for survival, uncontrollable rage state he possibly enters during intense fights and getting injury, his revenge on kids for injured eye and attempts to kill him during the climax fight. Thoughts about detecting borders between being villain and normal character with understandable strong motives and desires. Thoughts about how Sharptotoh would live in normal life, living in his own great valley - no dangers, food and water, maybe even family...
All these thoughts made me like him even more. :')