I think BMracek has it right - Buffett and Berkshire is about investing in companies for the long term.  My favorite quote of Buffett is probably "my favorite holding period is forever".

There is also the issue of whether the market is always efficient in evaluating the value of a company like BRK given home much is based on fully owned subsidiaries that individually would rival many of the names on the NYSE.

I don't advocate following the moves of famous investors - but I think some of them offer plenty of valuable lessons that can be useful in forming your own general investment objectives and strategy.  I would put Buffett at the top of the list in that regard.