In a non-biased way, I really think that the NHL is much better than the NBA.
There are so few really good teams in the NBA. At the beginning of the year, you can be pretty certain who are going to be the best 3 teams. I think this is a result of there being a few physically dominant players.
In hockey, there is no physically dominant player, because there are so many different things that are useful to a team. Whether short or tall, muscular or lean, fast or strong, or even just average, there is a position for any athletically able hockey player.
The NBA's rules and makeup really make it so taller players are better. By having a 10 foot hoop, guys who are 7 feet tall are automatically useful, even if they're not in great shape, just because they're tall. Basketball is probably the only major sport that can still recruit valuable players who have never played the sport before.
Statistics that show how overwhelmingly dominant tall players are include the percentage of 7 foot tall people in North America that are in the NBA (something like 20%, and the other 80 just have too many back problems from being so tall), and the fact that the smallest players are still over 6 feet tall, and 60 percent of the league is over 6'6''. Imagine how different the sport would be if the hoop was 9 feet tall or 12 feet tall. 7 footers would be astronomically less valuable. If you slightly change the size of the net in hockey, there is little difference in who the best players are.
Therefor, the NBA doesn't really even measure who the best basketball players are, just who the most athletic tall people are. I think a team like the Thunder is the one redeeming factor of talent in the NBA, since their game is based purely on good shooting accuracy.
In sum, the NBA is too individual of a sport. A few players can make a team the best (Miami Heat) and anyone who doesn't have LeBron, Kobe, or Durant has to pay a lot of money to put together a worthy team. NHL creates such a full team sport, and I think is the most balanced sports league in measuring ability. I was born and raised in LA and I've always been a much bigger Kings fan than Lakers fan