I gave up on the Pebble long ago (found it mostly useless), but one thing I do remember is that I was constantly running out of battery while out and about. I've been using an LG G watch for quite a while now, and running out of battery has never been an issue.
It is counter intuitive, but the LG's ~36 hours better life actually works much more reliably for me than the Pebble's two days (when it goes all buggy) to 7-8 days (when it doesn't, and you mostly ignore it), The reason is that I *know* I charge the LG every night, just like my cell phone. I quickly got into the habit of setting the watch down on it's charger thing as I put my wallet, phone, whatever on the nightstand etc. The LG is forgiving enough if you do forget to charge that you'll probably make it at least till noon the next day, but I almost never forget for the simple reason that it's a short, consistent pattern.
With the Pebble, I didn't want to wear out the battery by partially discharging each day then charging back to full each night (TBH I don't know if it's battery works that way, I just figure less charge cycles is probably "good" somehow.. shrug). So I tried to remember to check, pay attention to the low battery alert, whatever. It just didn't work. It was much more tedious and failure prone then just knowing I set something in a certain place each night. Sure, I could have just said screw it and charged it every night regardless, but then it's only equivalent to the Android options at best.