If you are looking for a good Android 5.0.2 Lollipop AOSP ROM (What is AOSP?), then definitely check out the BlissPop ROM.
Based on latest Android 5.0.2 Lollipop, BlissPop is a highly-modified version of CM12, bringing you a ton of customizations including some features from Android 5.1. I know Android 5.1 just came out and one of the coolest features is its drop-down WiFi menu so you can easily switch your wireless network. Well, with BlissPop, you get pretty much the same feature with its Bliss Interface in Settings.
I know official LG Lollipop is out for most LG variants but for those of you with T-Mobile G3, the wait has been a bit too long, we have still not received official Lollipop update even after 3 months while other variants have received them. But no worries, you can easily root and install a custom ROM such as the BlissPop ROM, bringing your phone back up to speed at Android 5.0.2. Of course, you will lose your LG native camera and IR blaster feature but it’s not a huge deal since Google Camera does fairly well and hopefully you are not a pro-couch potato.
What I really like about BlissPop ROM isn’t just the endless number of customizations, it’s the way they have it organized, making it easy for users to easily navigate through the menus to tweak their phone. BlissPop may have one of the most customizable Lollipop ROMs out so far which includes wide array of options including customization for you status bar, navigation menu, recents menu, notification drawer, lockscreen, power menu, and comes with goodies like Gesture Anywhere, App Circle bar, and much more.