There are two basic tripods to consider. The first is the pan and tilt. In our experience, we seem to have broken more of these. In addition the range of motion on the tripod is limited and can be awkward. The alternative is to buy a set of legs, and then pick up a ball head separately. This is more expensive, but in our experience, a much wiser long term investment.
When you are photographing landscapes, flowers, insects, you may want to get down to the ground for a unique perspective. To do this, you will need to check the minimum height of the tripod. Ideally you should be able to bring it down to about five inches from the ground. There are a few different ways to achieve this perspective. Some tripods have an adjustable, or reversible center column. Others have no center column at all. Again, for stability purposes, we prefer no center column.