We've had (in no particular order)
Blue lights
Bright white lights
Icicle lights
Warmwhite lights
Tiny lights (I think they're 'rice lights' )
Pugs
Polar bears
Tartan with or without stags
I need to buy some new lights this year. Last year I got some of the battery op rice lights on wire to go in a big vase, but they're too fragile for the tree .
Is it still going to be warm white?
Maybe amber?
Are coloured lights ever making a comeback? 
I'm betting this year there will be Unicorns .......