I find plain black paintjobs to be boring and uninspired, and well, not really paintjobs at all. Congratulations, you have a base coat, what are you going to do with it now?
I agree, I just painted my NF with the modelling paint I mentioned earlier, I was gonna do black but decided to go with a dark green, with black for the accents (barrel, tube, etc). It came out pretty nice. I thnk using other dark colors with black accents would work pretty well too. I haven't decided what to do with my LS yet. I was thinking a dark maroonish color.
BTW, all these suggestions about paint are great. Thanks everyone.