Beware the fatigue that sets in with these "boring" money makers. It can be very difficult to keep your motivation high when working on something like this, especially in the beginning where you're not making money and no one takes you seriously. With a funky web app, at least your friends and family might understand it and think it's cool. Doing a startup already takes a lot of motivation. It's significantly harder…
The single most important anecdote I've ever heard about software is this: In the early days of VisiCalc, Dan Bricklin travelled with his Apple II, demonstrating his software to potential customers. The response from 'computer people' was generally fairly muted - they didn't see what spreadsheets did that they couldn't already do in BASIC. People with no experience of computers assumed that computers could do damned…
Those can be rough times. If it's an app that you use (ie. eat your own dog food), that can help you through this stage. Otherwise, motivation can deplete quickly and you walk away before meeting the person whose life you would have changed.