I can read tab ok (not that I ever really need to, I'm pretty good at picking out a bass part by ear by now), but I wish I could read notes. I certainly had no talent for it, people who started with me taking lessons from my (jazz inspired) bass teacher were much quicker on the ball. I tried for about two years and never really got to the point where I could play something at a normal speed in eights fluidly (or by the time I could I had actually learned it by heart and wasn't reading anymore). Probably has to do with the fact that I'm hardly numerate. Tab is primitive but descriptive, it's like drawing a car as a symbol rather than writing "car" in letters.
If I could sight-read I would probably play more classical pieces just for the heck of it. To learn Dee Dee Ramone bass lines it is of kinda limited use ...