One of my pet hates is the use of far-too-close-miking for solo instruments in orchestral recordings, which leads to a totally unrealistic ultra-pin-sharp position in the stereo image because, of course, the reflections just get swamped. It's nothing to do with the hifi kit, of course - it's the fault of the occasional over-zealous balance engineer who thinks the composer's orchestration and the conductor's musical ear need a helping hand to bring out the "important" bits.