Ok, I've been thinking (haha, it's like a puzzle I want to crack!) and I definitely think you're IEI. Feel free to quote these reasons in your thread if you think they're at all relevant.
I think you're much more conscious of Fe then you are of Ni in a way that suggests Fe is your creative function which you selectively deploy. In myself for example: I'm much more aware of Ni then I am of Fe, to the extent that the idea I'm Fe-base took a really long time to make sense. Ni for me is like glasses you put on - every time you 'use' it, you're aware of 'wearing it' (even if I don't have to make a deliberate choice to use it). Fe on the other hand is integrated into your vision. It's like um...being short or long sighted. Until other people and kind doctors point it out, you have no idea that the way you see is particular, so how can you identify how you're different and what causes that? Ok, badly explained. Long day writing papers, is my excuse.
Even the way my last message described Ni - it was all about how I use it; what purpose it serves. It does things for me that I'm aware of. In contrast, I'm not sure what Fe does for me because I don't use or produce Fe; I am Fe. I read people without being aware that reading them and I react immediately. It's only through socionics that I realise that I'm doing it at all, reading, reacting, reflecting, constantly taking in non-verbal cues and emitting them. That I produce the effect I desire to produce doesn't require any awareness on my behalf at all.
I think the way you use and deploy Fe indicates you're Fe-creative.
So, my vote is definitely for IEI-Fe.
Sometimes questions:
1. Do you normally approach people or do people normally approach you (because you seem warm, friendly, inviting etc)?
2. Would you say people find you judgemental - if not in your character, at least in the way you deploy humour?
3. Do you find yourself affecting/setting the mood of most endeavours you're involved in, or are you less intrusive with your moods?
4. In a group, do you established the 'mode of communication'?
5. In a social environment, do you fit in quite seamlessly with the social environment, or do you find yourself chosing between either remaining outside of it, or intruding and thus disrupting the flow and redirecting it?