What changes make fishing more interesting?

Solution 1:

Taken from the changelog for 1.7.2 on the minecraft wiki

Fishing

• Changes to fishing mechanics
• Items other than fish can be obtained by fishing.
  • Fish: 4 items total, including Raw Fish, Raw Salmon, Clownfish, and Pufferfish.
  • Treasure: 7 items total, including enchanted fishing rods, enchanted bow, enchanted books, name tags, tripwire hook, lilypads, and saddles.
  • Junk: 11 items total, including damaged fishing rods, water bottles, rotten flesh, string, leather, bowls, sticks, boots or damaged boots.
• New enchantments for Fishing Rods that can change your luck when fishing.
  • Lure - reduces wait time to catch an item.
  • Luck of the Sea - increases chance of getting treasure and decreases chance of getting junk.