I was shocked when I discovered that my own footsteps made noise, I thought someone was following me at first😂
OK - LOL! If you’ve worn aids for 30-odd yrs like me, you have to answer in chapters, cuz the aids I’ve had have come a LOOOOooOooOONG way in terms of quality and features. 
Chapter One - 1985. Biggest surprise was being able to hear fellow students in an auditorium-style classroom in grad school. WOW! Downside was that the aids vibrated when I’d shift my car (4 on the floor). Weird.
Chapter Two - 1993. Biggest surprise was that I now had a few programs to use in the aids. Downside was that they were too smart for their own good, always dampening SPEECH in loud places. Augh.
Chapter Three - 2012. HEY! Now I can stream sound from the TV or my cell phone to my aids with the TV Connector. Very cool. Downside was that I had to wear a dorky, clunky necklace that banged against my teeth if I bent over wearing it.
Chapter Four - 2018. Now I’m streaming to my AID (yes, only one of 'em!) without the clunky necklace. Downside was the obvious - my brain actually works better when I hear through BOTH ears, but the Phonak Audeo B-Direct only streamed to ONE. Doh.
Chapter Five - 2019. WoooOooOO!!! I got my first pair of aids that let me stream phone into BOTH ears stereophonically. I’d already been doing that with the TV Connector paired/connected to my TV, but this was another giant leap forward. Downside, I could only have ONE pair of aids paired with my cell phone. Fudge. What if I have to send a pair in for repair? I gotta yada yada to get the backups paired/connected to phone.
Chapter Six - 2022 (You can see I’m ready to publish a novel on this saga!) I got the latest Phonak Lumity Life aids that not only offer superb speech comprehension, but a Music program that let me hear new sounds in all the classical, jazz and rock music I’d been listening to for decades. Plus, I can pair more than one set of aids to the phone, so if I swap out the aids every other day, I’m automatically connected for streaming phone calls - no prob! Downside? Weeeeeelllll, the aids were supposed to be “waterproof” but, um, er, that is to say, they are NOT. So I was bummed cuz I’d believed the marketing hype and planned to enjoy water sports actually HEARING folks around me for the first time. Yeah, well that dream died hard. I now remove these aids and enjoy water sports in my own silent universe of cinderblock ears. Better than nothing.
I’m wondering what Chapter Seven will bring, but until that time, I’m actually at the most comfortable, confident period of time I’ve ever lived in with these aids. I’m very grateful for that.