The snake is associated with evil, deception, immorality and devastation. Snake tattoo designs are popular because they also are a symbol of evil and represent the Christian story of Adam and Eve in the Garden where the snake tricks them into disobeying God by eating of the fruit.
Snakes are viewed as the keeper of the underground since they often reside under the earth's surface. The snake does have some positive meanings attached to it. Many cultures around the world consider the snake to be rich in knowledge and wisdom. Native Americans hold the snake in high regard, and the ability of a snake to fight its enemies is a sign of strength and power. Also the snake is a Chinese zodiac sign for individuals born in certain years.
So snake tattoos are very flexible in nature, they can have a meaning attached to it that is unique to the individuals wearing snake tattoo designs. Some of the most popular designs are rattlesnakes and cobras. Snake tattoo designs are a popular choice to use with other designs such as a skull, or with other animal tattoo designs like panthers and tigers.
You have many options when designing your tattoo, and you have equally a number of options when considering where to have your tattoo placed on your body. The arm, wrapped around your leg or on your back these tattoo designs can be in several colors, usually dark with bold lines which improves the artistic beauty of these designs.
Snake tattoo designs are usually large and detail oriented which makes it difficult to design. I would recommend you consider online galleries because you will need a true professional to design a great snake tattoo. When you opt in to the good galleries (usually a small fee) you will have access to higher quality designs and better artists via the forums you can be part of. This is where the experienced tattooist and tattoo enthusiasts hang out. I have my preferences on which are better, but I will defer to your judgment, I only recommend that you don't cheat yourself of the opportunities to have a better tattoo, after all, it will be part of you for a very long time.