I personally prefer the NASB. As an early Christian, all I wanted was something that I could read easily without having to learn Old English. As I have grown, I have come to learn that picking a Bible translation really is one of the most important matters you will ever handle. How accurate the translation is will, in effect, determine how accurate your theology is. How accurate your theology is, in effect, determines how close (and accurate) your walk with God will be.
The NASB is from the Alexandrian manuscripts which is important. Many cling to the KJV despite how many times it has been proven that the Byzantine manuscripts (from which we get Textus Receptus) are less reliable. I also like how they stick to more of a word for word translation to ensure the closest possible accuracy.
While there are many good translations out there, The NASB & the ESV are my 2 preferred Bibles. Oddly enough, both stem from the RSV.