I also did my BA in philosophy (epistemology and Heidegger) and my MS in computer science. I sell my philosophy experience as an ability to quickly understand and manipulate abstract concepts. I used to be pretty confident with this position, but these days I am less so.

I think the greatest benefit of my undergrad years haunting the philosophy department is that if I'm going to argue a point, I'm damn sure I'll have satisfied myself with my position, and have ready refutations for all counter-arguments I can think of. I don't comment much on web sites because the rigour of this far exceeds the two cents my opinion is worth.

My advice for anyone contemplating philosophy is this: learn to be good with analogies. Explaining abstract concepts is difficult and a good analogy (and here I mean a genuinely fitting one) goes a long, long way. If you spend a lot of time just thinking about stuff anyway, studying philosophy really gives you a lot of quite interesting stuff to think about: what is truth? Can we know something without expressing knowledge of it? If so, how can I know that you know something without your expressing it? A heady trapdoor indeed.