If you would have asked me how I felt about Apple a year ago I would have told you to run in the other direction because their products were pieces of shit. This was after my experience of having gone through 3 iPods (all manufactures problems) and my fear of change. After I moved in with Jon, I was always using his 24" iMac because it was there and convenient. I had my troubles: relearning all the short keys, not having simple programs like Paint or Microsoft Word (which I eventually got MS Word), not being able to rename an entire batch of photos or files at once (I still haven't figured out a way!) and not being able to plug in my BlackBerry, but as time would tell it grew on me. I was suddenly becoming apple savvy, and not just on the iMac. Shortly after I started using photo apps on Jon's iPhone to take and edit photos. I almost completely stopped using my BB because of the quality. It's taken a while for me to completely convert, but here I am, just purchased my first Macbook and iPhone.
So far I've downloaded the basics: Facebook, Instagram, Words With Friends, Tumblr Gear and I'm taking full advantage of the apps that Danielle has mentioned noteworthy.
What are your must have apps for the iPhone?