I think it`s important to find your passion, and then try to find the niche of that and build a business around that. You really need to know and have a passion for your business, so what better than doing something you love.
Does that make sense?
I looked for "the perfect" business for years - and run low on funds "looking". If this is your first time, there are many businesses out there. Don't wait for the Mercedes first - be happy starting with the little beater to get you started and learn what it is to run a business.
I wanted to be in manufacturing, but ended up in recycling. As I look back, being a simpler business allowed me to learn all of the new areas I hadn't dealt with before. There is a LOT to learn just running ANY business if you haven't done it before.
Don't look for perfect - look for good enough. (smile)
Hope this helps...