There are lots of mobile phones in a variety of designs. There is the candy bar, QWERTY, flip or clam shell, touch screen, slider, slider QWERTY, twist, touch slider and so forth. Each design has its pros and cons.
We do have a preference for the QWERTY and flip phones for convenience, design and ease of use. However we are definitely open to trying new designs to see if they are any good.
QWERTY keyboard phones are usually very easy to use and allows you the ability to properly reply to emails and SMS on the run. As a result of the keypad they usually have large screens. Some keypads are naturally better than others but most are very easy to use.
Clam shell or Flip phones are so convenient and usually stylish. There is nothing easier than flipping open your phone to answer a call or flipping it shut to end it. The keypad is nice and large and the internal screen protected. it is unfortunate the most manufacturers don’t make top range flip phone anymore (2010).