OP, did you end up getting them? I’ve got a few piercings myself, plus a failed sternum piercing. The keloid scarring has mostly faded now, but for a while it honestly looked like I’d had heart surgery.
I’m planning on getting a few more in the tops of my ears. As for the gunk, good hygiene definitely keeps it under control, but I also found that using a soft plastic bar with a steel ball on the end made cleaning so much easier.
I can’t remember what they’re called, but I had one for my sternum piercing and it made the healing process so much more comfortable than using studs or regular earrings.