I like numbers. I like measuring things. I like knowing how far a ride was, if I went faster than last time, if I went the same speed, but my average heart rate was lower, it means I'm getting in better shape. So, for all those reasons I've had-
Garmin Edge 205
Garmin Edge 305
Garmin Edge 705
Garmin Edge 800
I am still using the 800, it has by far the best battery life of any GPS I've ever encountered, and every time I'm tempted to go for that shiny new 820, or 1000 I'm reminded of how awesome my 800 has been and how rock solid it is.
I also use a garmin virb basic front facing cam, it turns on automatically when I start my gps, and turns off when I stop, it's mainly for safety but I confess to liking electronics.
I upload all my rides to Garmin Connect, and use that to track my miles.
Joe