If anyone asks, " what's your favourite emoji?"
I would like to say there is no fixed emoji. Maybe now I like 'this', after a couple of times, I will prefer 'that'.

1) So how can I explain my entire answer in one sentence ?

Question

If anyone asks, " what's your favourite emoji?"
I would like to say there is no fixed emoji. Maybe now I like 'this', after a couple of times, I will prefer 'that'.
		
1) So how can I explain my entire answer  in one sentence ?

Answer

"It depends" or even it "I don't have a favorite, it changes all the time".

These answers are both pretty simple and can be used in different contexts.

Answer

Hi Labiba. You could say “My favorite emoji changes depending on my mood.” Or something like that. Does that answer your question?

Answer

Hi Labiba,

If you want to convey the meaning of what you have written in a single sentence, then the below is a possible solution.

If anyone asks me what my favourite emoji is, I would answer that I don't like a specific/fixed one as my preference tends to change.

:-)