Frankly, they're not very pretty or refined in appearance. In fact, they look downright primitive. Rough hewn. Like a throwback to a (much) earlier time in the bass guitar's history & development.
The bodies, generally, are not contoured at all - just a block of wood without any "tummy cuts" or forearm cuts. Not even rounded very much at the edges. They give new meaning to double bass players' use of the term "slab" to refer to electric bass guitar.
The headstocks aren't much better. They look somewhat "Fenderesque" in the own way, but that sharp notch along the lower edge (when worn/played horizontally) looks ragged and out of place.
Similarly the neck to body bolt joint looks almost as if it was slapped together. Again, no particular attention to detail, much less any artfulness or style. Just crude.
I reckon their main saving grace, as ever, is the sound. As long as they continue to sound great, a lot of players will continue to forgive the retrograde design.
For years, I just couldn't get past the look & feel of G&L bass guitars. But even I have recently reconsidered my ways, and may yet pick up an L-2500, probably sometime during 2013. We shall see...
MM
The only non-contoured or non-smooth-edged G&Ls I have ever seen over several years of picking up just about any G&L I come across have been either the early cheaper SB-1/SB-2 student models or the ASAT (which is understandable as it is a Telecaster inspired design). The headstock design is a matter of opinion- I'm not particularly fond of the lil tooth on the newer ones, but it has grown on me. I find the attention to detail as good or better than comparable Fenders, though if you are only perusing the used market you are more likely to see more duds with either company- the G&L finishes are a notch ahead in my experience. I have yet to own a G&L with a bad neck/body joint, so I wonder if you are referring to a bass with a non-original neck? I have seen a few of those in used stores. Unlike Fender, G&L necks are sometimes not as easily swappable fit-wise (though I have done it a few times with good results) and they don't offer aftermarket necks unless you send in the bass to have one custom built. Playability-wise and sound-wise I have found all my G&Ls to be at the top of the pile for my tastes with the exception of my old L-2500, though I have found few 5 strings I enjoyed the feel of for long.

