Psychological depth in Tolkien's characters

[Eurytus]

As a matter of fact, I think that the popularity of the device seen in the friendship between Legolas and Gimli stems largely from the fact that it is an effective device. Alas, such easily recognizable and easily implemented devices are often used as a desparate measure by poor writers. But that does not diminish the effectiveness of the technique itself.

I quite agree with the last sentence. Where we differ is that I think I have seen made for TV movies with 'odd-buddy relationships' that have more characterisation that Legolas & Gimli.

Hell, I may even have seen Chuck Norris movies with deeper and better characterisation!