I guess I see being an SP as a job not as a personality characteristic, so it would totally be dependent on the lady you are dating. Of course, there are perks and downfalls of dating a person in every profession. For example, when dating a mechanic: Pros: never needing to take your car in again and hearing that the blinker fluid needs to be chaged AGAIN. Cons: kind of dirty and maybe not the best paycheck. Or a doctor: Pros: there would be free medical advice and nice paycheck. Cons: long hours and always wanting to play golf (YUCK). So with dating an SP: Pros: she sets her schedule, she will have awesome stories, she will most likely be able to listen to your boring-ass stories without yawning, of course she most likely be awesome in bed and maybe a little bit more openminded than the average gf. Cons: worried about her safety (this would be the hardest for me).
Now if your the jealous type and not interested in having an open relationship than I suggest looking elsewhere, I can't see this working. However, if you are attracted to her and she has what you are looking for in a gf, I think it could be awesome. BTW, I do know an SP whose bf knows what she does and fully supports her. He even gets off to hearing her stories in bed. So not everyone could be with a mechanic or a doctor or an SP. It just depends on both of your personalities if its going to work, not her career path.