Here is my temporary solution.... a $0.40 rubber o-ring from the hardware store! Comfy, and it will probably come off before injuring me. It works great for now.
I was a bit heavier when I got married... here in the states we just call it fat, and I think everyone else in the world calls it spoiled Americans...
anyhow I got into shape and lost about 73 lbs and now my ring won't fit properly anymore causing me to lose it oncel. I was however lucky enough to find it somehow, I believe the threats from my wife helped double my efforts in searching. So, with it not fitting properly, and the near miss losing it... I do not wear it anymore. My wife knows I love her because I made the sacrifice of not wearing the ring as I didn't want to lose this very important symbol of our marital bond. Plus it was damn annoying spinning and flopping around on my finger. (That's what she said) Anyhow, If you have a strong trusting relationship, then taking the ring off to play guitar would be the best answer. (I've seen some people who think that you can't take the ring off for any reason???)
So, given that I'm no expert on the subject, I'd say that if you have a more traditional gal then she will push the ring issue once your engagement goes platinum and she will really want you to wear this very important gift that she bestows upon you as her trusted soul mate. Since we all know that you should honor your beloved, (or pay the price) you could look for an alternative material that the ring is made of. Maybe find something that would break a bit easier if you got it really hung up good where you would have more of a chance that the ring would break hopefully before yanking your finger off. Cemented carbide is becoming more popular these days. The ring will eventually get comfortable and you will not be so annoyed by the feeling of it and be more likely to be able pulling off playing with it on.
Ok, actual real advice now... whatever material you get a ring made of, make sure it fits your finger snug. I will tell you from experience of wearing a ring for 15 years that I never got it caught on anything near as much as I did when it became loose on my finger. When it is loose it will get hung on everything that passes by your hand. Also, I believe that a "comfort fit" band will tend to snag up a bit more than a regular shaped ring. You should be able to google comfort fit for more info. If you can get away with the o-ring... go for it but I'm guessing that your future misses is not a plumber, so she may not be down with "My Precious" being an o-ring wedding band... Good Luck!