Recently a Khorne Chaos player complained that his army has a hard time playing against Eldar due to skimmers that can't be taken down in HtH combat and lots of shootiness. Tau players complain that playing against Khorne is hard because they get chopped up in close combat.
Am I the only one who thinks that when you choose to play an army with an extreme style, whether it be all close combat or all shooting, you leave yourself vulnerable to an army able to negate that style? That's not a big secret, you know. Its called playing to your strengths and to your enemy's weaknesses.
Personally I think balanced armies are the key to solid gaming and all round fun, and I scorn extreme armies of either shooting or close combat. Fortunately, I've learned how to operate my army well enough that when faced with an extreme style army I can try and exploit its weaknesses. Sometimes I succeed, sometimes I do not. But at least I don't complain about it.