I am going to start a blog and want to get some input as categories or niches that might be popular in today's market.
blog about blogging, there are a lot in this niche at the minute along with make money blogging. it depends if you want to compete or not? sometimes its best to go for a small market and try to dominate that one.
LOl It will take a while to get good search rankings for those niches as even a lot of the long tail keywords have been targeted look a some of the competition I'd suggest celebrity names and then add other keyword phrases to them like nude, naked, breast, nipple exposed etc etc Country related topics there are some huge search volumes with very low competition.
Are you suggesting there is not a lot of competition for celebrities. Also, what would be examples of niches for Country?
Blog about something you like... otherwise you'll struggle a lot posting original content that can have some real value for your visitors... if you write quality stuff, you'll get noticed eventually.