I only upgraded my Nexus 5 to lollipop about a week ago (a custom ROM).
So far I'm not really a fan. I hate how notifications are handled. There's standard "Silent" setting - have to use a "priority" notification setting to make it silent.
I don't mind notifications on the lock screen but I have the setting to hide private info (which hides who a message/email is from etc), that's all well and good but the fact it shows "private info hidden" just seems ridiculous, it doesn't need to say that.
I have to force close a certain app twice a day (radio app that doesn't turn itself off when disconnecting from Bluetooth - though thinking about it I might be to do something with tasker) and it's more hassle to get to the app settings to kill it. Used to be able to tap-hold the app in the notification pull down or app switcher thing and you could go right to app settings.
Having to swipe to get to the pattern unlock screen is a pointless gesture.
I think I have some other issues too.
EDITED: 16 Jan 2015 19:51 by ANT_THOMAS