Since you're posting this in a turtle forum, I'll guess that your poll stats will be leaning a little towards the first option.
I wish I could answer your question from both perspectives, of a turtle and a tortoise owner, but I only own a red ear slider so I'll tell you why I chose a turtle over a tortoise. First of all, I feel in love with red ear sliders. From the research I made, it seemed that aquatic turtles are easier to maintain than tortoises and also more entertaining to watch. I hear that you have to change the substrate in a tortoise enclosure quite often and throw it away, as opposed to water that costs literally nothing. Also tortoises spend quite a lot of time buried in the soil and only come out occasionally and to eat. The fact that I went from having fish to aquatic turtles also made my decision a little easier.
Note: My knowledge about tortoises is a little limited, basing it only on the few things I've read on this forum or hear about from friends, so if any of my facts are not 100% correct please feel free to set things right.
