If you think that your personality is defined by simplicity and humbleness then a single line tattoo should be the best tattoo design which you should go for. Line tattoos are truly amazing and they represent and propagate the idea of minimalism.
There are many different single line tattoo designs which you will be willing to take note off. You can think of a single lined cross or you can even go for an anchor made with single line.
You can even make the skyline of your hometown with a single line and that being itched on your hand or wrist would mean that you carry your home with your wherever you go. It could also mean that you have your hometown in your heart.
Dot work in a straight single line also looks really pretty. This is called pointillism and this is one of the most popular trend in the tattoo world these days. You can make this on the back of your neck or on your back.
You could even make a straight link on your finger and that will make it look like a ring.