If you use a Danforth style(which work and hold great), don't use a high-tensile, which will break your rode or something on your boat and still not let loose. The standard "S" type will bend and let go, and you can bend them back.
The bottom really dictates what anchor to use. Sand: Danforth. Grass: Fisherman or Rebar. Mud: Plow or Bruce.
I did 12,000 miles in my 38-foot powerboat in the Caribbean, and had five different style anchors, and needed them all at one time or another.
I'm an Eighth Day Adventist. On the Eighth Day, God went fishing!