That depends, from what I hear they bite, and hard.
If you want a turtle you can handle easily get a Slider. Females get big so keep that in mind. Also keep in mind that to buy a total new set up your looking at a few hundred dollars, if you savvy. They need a min of 75 gallons, 100+ if you want two. You need a basking area out of the water, UVB and UVA/basking lamps and so much more (Filter(s), heater and so on).