Jazz bass profile neck which tends to dive if you don't play it in the right position (i.e. high up and rest your elbow on the rear horn ala John Entwistle) and not dangling round your knees.
I found the mahogany body to be too muffled and warm sounding for my liking. Mahogany is great for guitars but for basses I don't think it works well at all.
If your playing rock i.m.o. there are much better basses to use (precision, Jazz with hot pickups, Traben Core basses, Ibanez SRX, etc). The Epiphone Thunderbird (older ones) are similar in looks only and sound completely different to a Gibson.