Exodus 3:13-15 present a wondrous study on the "Nature" of God. In verse 14 God said He is "אהיה אשר אהיה". Think for a second to take special note of what that literally equates to. Those three words convey: Those three original Hebrew words convey "all" of that! God next said for Moses to tell Israel the one who is called אהיה has sent him to them; thus collapsing the meaning of the three words into one! So, again, God told Moses He is אהיה אשר אהיה, and then collapsed the meaning of the three words into the one word אהיה. So, I'm sure you can understand that after reading this, using the English "I Am" to represent יהוה just seemed weak and beggarly. It looses way too much meaning in translation.
An old problem solved!
The pronunciation of God's actual written Name of יהוה has long been lost to mankind! No one alive today knows how to say it. And, since יהוה warned many times about the sanctity of His Name and the danger of misusing it; (Exo 20:7; Lev 24:16; Deu 5:11) one might choose to wonder if using a name that is not really "His Name" might be dangerous... The pseudonym אהיה, however, which God himself gave us through Moses, is still commonly pronounced in our day in time. So, while יהוה is the proper written form of God's Name, referring to Him as אהיה seems a respectful and appropriate [safe] way to speak to or about our Creator. This explanation by God seems an important part of His Nature. Your faith in all such matters is and/or reveals "your" nature! God cares and is listening... (Mal 3:16-4:3)