Welcome, Chavela!
Balleteach is our most experienced hipster (good to see you back) and full of good advice. I think I am still the newest hipster here, so I can only tell you of my limited experience.
I am a 53 yr old female. I had simultaneous bilateral THA on 5/23/05. My original MRI's/x-rays showed that I had moderate-severe OA. I was functioning but in pain a lot. I am very athletic so it was hard. When I first went with my MRIs to the surgeon that did my hips, it was supposedly to see about having an arthroscopy to repair torn labrums in both hips. However, when he looked at the films he said there was nothing left to work with and both hips would need to be replaced within a year. This was a very different diagnosis than my original surgeon and the radiologist that read my films.
When he got inside, it turned out that my hips were much worse than the films indicated. There was bone loss and spurs that needed to be removed. My left socket had to be screwed in due to bone loss. The pathology report came back 'severe OA'. So films do not tell the whole story.
I think your decision has to be personal, cause only you know how you feel, but for me, I am sorry I waited as long as I did. I spent 2 years trying every alternative to avoid surgery. Now that I have had it, I am thrilled with the quality of my life. Like you, I am not thrilled with living on pain meds either. Now I don't need any!! And I am already getting back to doing all the things I love so much. I realize now that I didn't know how much I hurt before surgery or how much I was being limited.
Now my little speech

If you are considering simultaneous bilateral, start right now to get yourself in the best physical condition you can! You will not have a good leg to stand on so the rest of your body has to take over. It is not easy, but the pay off is hugh if you can get really strong all over and lose as much weight as possible. I spent the 2 months I had waiting for my surgery busting my butt lifiting weights, doing ball work, working all my body so that I was stronger than ever in my life going into my surgery. The result has been an incredably fast recovery, well worth all the effort.
Good luck with whatever you decide is best for you. Hang out here, there are lots of great folks with lots of experience and super support. Ask lots of questions, make sure you love your surgeon and stay positive.