I love my actual piercings. Right now, I only have 11, but I have had many more that have come out for one reason or another. Many of them, like my tongue, I plan to get again, and more in my ears. I have considered getting my hips pierced as well, though that can be pretty painful. I'd probably get dermal piercings for those.
I don't really have any concerns with them, heart conditions from piercing come typically from infection, which is due to not caring for your piercing the way you should, or having it done at an unclean place. I don't actually go to piercing shops often, a friend of mine who has the sterilized equipment did several of mine, and I did some on my own as well, with pre-sterilized equipment.
The only issues I've had were just random occurrences . I had scar tissue from my Industrial piercing, which went away with something called "Cutivate", which is just a steroid cream. That was because I had scar tissue there that was aggrivated. I also have had to take my tongue ring out 3 times now, the first time was because I got in a fight and it got ripped out, the second time was because the jewelry was too big for my mouth and it was uncomfortable, and I didn't have any access to different jewelry for a weekend, and it was too painful, and the third time was because I got REALLY sick and my throat had swollen up, and it was hard to eat with my throat AND a tongue ring AND lip rings, so I took the tongue ring out so I could keep my snakebites