It takes you how many tries to capture an area on the screen? If you are using something other than Capture Express, then the answer may very likely be "several tries".
Unlike other capture programs which do not permit you to move the "grabber" once you start the capture, Capture Express allows you to toggle between a stretch mode and a move mode by right clicking on the mouse. So if you didn't quite get your alignment correct when you started your capture, simply click on the right mouse button and move the grabber to the correct alignment. Other programs will require you to abort the whole capture process and start again in the hope that you get the correct alignment.
Besides capturing basic Screens, Windows and rectangular areas, Capture Express allows you to capture items in a variety of shapes. Optionally place borders around the shapes and choose a masking color for the exterior of the shape. Some of the shapes available include rounded rectangles, circles, ellipses, diamonds, triangles, stars and other user defined shapes such as an octagon or house figure shape. Print, Save or E-Mail your captured images.