I've had to wear hearing aids for around 8 years. It was originally thought that I had noise damage caused by listening to loud music as a teenager, but they now think it is linked to Hashimoto's Disease, which was only diagnosed 4 years ago. I have been asked, very seriously, if I was ever in a war zone, as the damage to one ear is particularly bad.
The first ones I had were awful, the sort where the ear is blocked by a specially-moulded piece and the sound fed in. I never ever got used to them - the sound was all wrong, the noise in "noisy" places was dreadful, and I couldn't differentiate between the person in front of me talking and someone on the other side of the room, and I couldn't use a phone without removing them. A relative has these (was all he could get on the NHS) and also struggles, but refuses to accept that there are better options available.
I have had digital, behind-the-ear hearing aids for around 6 years now, and can honestly say that I do not even remember that I am wearing them. I can't feel them on or in my ears.
When I originally had my hearing tested, I was told that the wait for anything on the NHS was "years", so I went to a private high street hearing centre. I paid £1500 for the pair, I get free hearing checks and replacement parts if needed. Mine are now 6 years old and positively antique compared to the newer versions, but are working well. Newer versions of what I have now cost a similar amount - you can pay more if you want more "features" (like being able to wear them swimming or in the shower apparently!)
I know a couple of people who wear hearing aids, and they are so self-conscious about them, but mine really don't worry me. I hadn't realised how bad my hearing was, I was just very happy that I could actually hear properly again. I used to work with small children, and they called them my "magic ears" as I told them that I could hear everything they did, even if they were in another room (worked wonders for their behaviour).