Kinda depends on both your preferences, budget and intended antenna mounting location -- the analysis indicates a 30-foot height, so perhaps that would imply a rooftop mast (or attic?). The array of stations and disparate azimuth vectors appears to point toward an omnidirectional-style unless you are keen to go with a directional antenna and a rotator in order to pick up the lowest-power stations on the odd azimuths. You may prefer an attic location rather than an external location if the roof is steeply-sloped or difficult to access.
A directional antenna with no rotator which is oriented properly toward the NNW might still pull in many of those channels which are to the SSE or vice-versa, but it seems the strongest groups are to your SSW so they might or might not be received okay with the NNW/SSE orientation if you really want to be capable of pulling in the maximum with a directional style. Deciding what channels you REALLY want to be able to receive consistently with good quality will help narrow the focus on what antenna style, and either type can be enhanced with a signal amplifer. If you've got a Fry's Electronics handy, they'll have a pretty good display and I've found their staff here in TX to have some reasonably knowledgeable people, but you ought to ask the first one who comes by to identify whoever he/she thinks is really the most knowledgeable staff rep on broadcast TV hardware. There's always Radio Shack, but these days with their downhill business trend it really depends on the individual store.
Ultimately, you'll have to put up an antenna and then perform some real-world testing to ascertain what azimuth works best for a directional type, or if an omnidirectional with amplifier will serve your needs adequately based on those preferences -- if there are folks you know in/around your neighborhood with broadcast reception which requires some sort of TV antenna, check with them regarding what their particular setup involves, what channels they can (or can't) receive with consistent good quality, and whether or not they're satisfied overall with the result.