Well my AW is gone! I've given it to my daughter. I hope she can get more use out of it than I did.
Enjoy (both her and the AW, and you and the Garmin), and I'm not speaking from bitterness or snark.
I've got both an AW and a Garmin 410, and I'm thinking of getting rid of the Garmin for fundamentally the same reason you gave away your AW -- I'm just not making use of its features.
It doesn't have BT, but it's got ANT+, which means I could use it with HR straps, bicycle speed sensors and power meters, running cadence sensors, etc etc. But I never got very deep into cycling or running data, so I never used more than half of its abilities.
I also tried to wear it daily as a regular watch, but it's just too bulky and uncomfortable.
Anyway, I guess my point is, if a gadget doesn't meet one's usage pattern, there's no reason to keep using it. Can't force a square peg into a USB port, after all.
Actually ANT is one of the things that upsets me about my Garmin. It auto-pairs with whatever foot pod it sees and my cadence is often pretty messed up in larger races. For instance, this past weekend running with a group of 10,000+ runners in a 10 mile race, I didn't get the usual interruption saying "foot pod connected" just because I ran too close to some guy wearing foot pods. This is normally something that happens in larger races. It's an annoyance but I live with it. I spoke with Garmin support on this issue and they seemed to indicate this is the way it's supposed to work. To make it "easy", the watch accepts input from whatever ANT device it happens to pick up.
As for bulky and uncomfortable, I'm with you on that one. My FR 235 is big. It's bigger than my AW was and it's not that much easier to see except that the display is always on and I don't have to do a "wrist raise" gesture to get the thing to light up. I should add that my Garmin's backlight rarely comes on while the AW is useless unless its backlight comes on. Also, to be fair, I have not bothered with Watch OS 3 beta. For all I know it could be a LOT better than what I was dealing with on AWOS 2. For me the "AW is useless for my main needs" ship had sailed long before AWOS 3 became available. I think the last nail in the coffin was that third party app that claimed to be able to mine my heart rate data out of health and export it to a CSV file. It provided a jumbled list of random measurements for me to go off and do my own math. No thanks. If I picked a range longer than a few days the app hung as it couldn't cope with such a "huge amount of data." No thanks squared.
Now that my daughter has my AW, I'm not finding I miss it. There are some things I'm glad to be rid of...
1) confusing haptics - I never quite got used to the haptics and I would bump my wrist during the day and mistake that for one of the haptics
2) wrist raise, shake, raise again, shake again, tap, TAP, TAPPITY-EFF-ING TAP to get the display to light up.
3) battery life - one day is not enough
4) special charger - Garmin has this issue as well but I can get by for 3 or 4 days without charging so it's not in my face as much as it is with AW
There are some things I will miss...
1) ability to see caller id on my watch (Garmin can do this but I have it switched off to avoid being distracted during runs)
2) ability to reply to texts from the watch either by picking from canned responses or using Siri
3) the SWEET weather app clock hours display of rain percentages (dark sky has something as useful but I must dig for my phone to use it)
4) Ability to see data "at a glance" via watch-face complications, Garmin has watch faces available but I haven't bothered downloading any of them.
My niece runs marathons in three hours, she has an AW and doesn't use anything when running them so ....
I wish I could run a marathon in three hours! I would still need some other missing features before I could go back to using AW for running even if battery life wasn't an issue. For instance, when the AW battery died, why didn't the running app on the phone save the run?!? I'm sure if I spent some time on this issue, I could come up with a solution that resulted in keeping my data after long runs.
But there are other important missing features...
1) Hardware stop start button
2) Hardware lap button
3) Lock the screen during a useful running app (not just Apple's workout app)
4) Export to Garmin Connect and the ability to export to other services without resorting to third party software
That last point is a huge missed opportunity for Apple. Apple could get data from AW to iPhone seamlessly but they don't make that data easily available on the web. Garmin is clunky getting data over to my phone but once the data hits the phone, it's on the web and a few seconds after that my coach can see it. Garmin has all sort of clunkly limitations. They won't let you create an interval workout either on your watch or on your phone but only on the web. I'm sure Apple could figure out how to get around this sort of limitation but alas Apple doesn't appear to even be thinking about competing in this area. To Apple it seems to be enough to be able to throw around the words "fitness" and "health" and leave the heavy lifting to their competitors.