Here is mine:
1. The user interface feels very smooth and snappy.
2. More amount of free ram in comparison to kitkat firmware(getting around 750 mb free in comparison to 500mb in kitkat)
3. Camera feels more or less the same
4. No XLoud
5. Now there is a sound played when the phone starts up
6. Power management is superb. Now we have ultra stamina mode.
Update: Those asking for battery life, I am getting nearly 6 hrs of SOT which is comparatively higher than what I got in kitkat