As with any MMO you'll find that they have different trade skills or crafting skills, however you want to define them. In WoW we have both, crafting skills being primary and trade skills being secondary. One of the trade skills is fishing which is one I'm trying to achieve the master skill for.
Currently I'm at 310 versus the max of 375. This one is a long take as right now I have to catch 10 fish per skill point. You might wonder why the rush to master, but fishing also ties into cooking where you can make some healthy foods from the raw fish. This is another skill in which you can earn some extra money which we all need when you want to buy those expensive items on the Auction House.
You also now and then get that one fish that you can put into a screen shot where you are holding it and can proudly display the big one you caught! So have fun with that fishing pole and get some relaxing time in.