Here are a few of mine:
KG vs Duncan in their primes.
Shaq vs Kobe after he left the Lakers.
Bulls vs Rockets in the 90's.
A few teams I wish would have made the Finals:
Nash's Suns when they were elite
The Kings during Laker's reign
A few that happened but I wish we could see/have seen more:
LeBron vs Durant (will there be more to come?)
Wilt vs Bill (only met once, Bill's last year in the league, Celtics won 4-3, West won MVP)
Magic vs Michael (only met once, I think it was Magic's last year before retiring early)