I know someone who has 3 of the same model Martin guitar (D28 I think) and she commented that one of hers was much bassier than the other 2 so there must be variations even within Martins...

The Martins I love the sound of do have what I would call a heavy bass but I wouldn't say too much - more like a perfect bass sound. I would guess though that if I can identify the bass sound as a feature I particularly like, it is quite possible for someone else to identify it as a feature they dislike - horses for courses I would guess.

Jon