I read through David Risley's Six Figure Blogger Blueprint and he mentions that you should blog about something that's not only profitable, but also an area of interest or where you are knowledgeable.
Now the only thing I can think of doing, a niche I wouldn't get bored in, is game specific niche.
There are plenty of other active blogs and forums in this niche that I am personally involved in already. The only thing I am worried about is the fact that there is only one digital product for sale in this niche, and it's a game guide, and I'm not even sure how well it sells.
I reckon the main market is in the UK mostly. Does that mean it isn't really big enough. I don't know how well financially the other blogs and forums do.
There are tactic guides and plugin software's available all over the net for this game, but they are mostly all free I think. Generally, as a market, they don't buy things and get disgruntled when people try to charge for information about the game, I think this happened when the guide came out.
I think there could be other ways to monetize though if there is a enough traffic. The game releases a new version of itself every year, as it's a sports game. I think a digital guide could be difficult to sell though, given how tight they are as a niche group, but I think it could be profitable if there were some "under the radar" monetization methods I could implement.
Any help is very welcome and much appreciated.