What niches are good for Email marketing besides IM niche.?

I am a newb, and no! I am not going to ask for a method that makes me $10828302 every month without me lifting a finger. I Know that is not how it works.

I am considering making an amazon affiliate site, fill it with huge amount of amazing content. And, review articles related to my niche.

But this won't be my main goal, my main goal will be to build a huge responsive list in my niche and send them 3-4 really good juicy emails to them every week and slowly sell some nice things to them.

I've never build a site before. Heck I've never even purchased a domain. But I figured the best way to do it is to just start and learn by making mistakes.

There is one thing I can't wrap my head around, The Niche?
I need a niche that's wide enough to write a lot of contents about at the same times there have to be lot of affiliate products for it plus lot of scope to develop an info product without much hassle.
And every thing should be email marketing friendly.

I can't think of a niche that's just perfect.
I know many people say that go into a niche you are passionate about.
I am passionate about IM. But I don't have enough experience about IM just yet. Also, I will be outsourcing the content as soon as I start making enough to pay a VA. So not being passionate about the niche is not going to be the problem.

Can you suggest a few niche that you think will be good for me.
Or maybe suggest a way to zero in on a niche.