My responses:
10.

He was too stubborn and arrogant and basically screwed himself over.
9. WWE didn't really miss out on anything. He still doesn't really have a personality.
8.

I've heard a lot of good things about him here but since I didn't watch WCW I first saw him during the Invasion angle. They treated him like a complete goofball.
7.

No we're good here.
6.

Management messed that one up real bad with their hubris.
5. Agree with this one. And I agree that losing streak storylines are stupid.
4. No he's in the position that he deserves to be.
3. Agree with this one. And I agree that losing streak storylines are......wait a minute.

2. I agree.
1.

I agree that he got screwed over but he wasn't getting past the midcard. Plus he's not really special in the ring. Maybe "wasted" wouldn't be the right term.
The fact that this list doesn't have DDP is

. I'd throw Bam Bam Bigelow in there too. He was an extremely entertaining big man and he managed to pull a decent match out of Lawrence Taylor. He never held a single title in WWE.