Haha. I had the exact same thoughts as you! I'm a tech nerd and I'm always researching the perfect gadgets for me and even after 6-9 months of the Garmin Forerunner 935, I'm still undecided!!! I think the AW vs Garmin battle is a truly personal one. I know you had the series 1 watch, but for me, the Series 3 was nearly the perfect smartwatch! But the couple weaknesses (1-screen isn't always on which bugged me on runs/bike rides. 2- you can't tell when the GPS starts or HR locks on at the beginning of the workout...so the start of my runs would always have messed up data. 3- not enough battery life to last thru a marathon) really pushed me towards getting a Garmin.
Now that I've had the Garmin, I notice it's weakness though!
1- I can't set granular notifications like the AW can. On my AW, I like having only phone calls and messages from my wife to come thru even though my iPhone has more notifications come in. With the Garmin, any and all notifications that come to the iPhone also go to the Garmin. So now I get buzzed on the wrist more.
2- I miss running without my iPhone. My job requires that I be on the phone during the day so with the Garmin, I need to bring the iPhone. Not the biggest problem in the world, but it's still nice to just have the AW and go out on a long run.
That's why I'm just waiting for the Series 4! Like I mentioned earlier, IF it has better battery life and an always on screen, I'm back on the AW train! If it doesn't do that, I'll still be happy with the Garmin Forerunner.