Agree on Sedona being a great town, but disagree on Sedona being lots of hippies and crystals and not interesting. In 12 years of going to Sedona 3 plus times per year, we have rarely encountered hippies and crystals.
Don't know what you mean as "far from interesting places." Guess it depends on what you mean by interesting. Flag is interesting in a lot of ways. There is the Lowell Observatory, and a lot of great history. I mentioned the Lava Tubes. If the trails are open around San Francisco peaks, the hiking and views are terrific.
As for Sedona, there are endless trails with a wide variety--steep arduous climbs, cool walks through creek beds, and beautiful, endless views of red rocks. There is also a history of western movies made in Sedona. There was (maybe still is) a great picture in the gatehouse at Slide Rock State Park of Charles Bronson and Alan Ladd from the 1954 movie Drum Beat.
A couple of places that have not been mentioned that are close to Sedona and interesting day trips are Jerome, Arizona, about 45 minutes via 89A. It is an old mining town reborn as a tourist town with lots of cool shops and haunted buildings that have been on Ghost Hunters. There is the Haunted Hamburger, and our favorite, The Asylum, a converted insane asylum that is now a hotel and restaurant. If you take 89A above Jerome, there is a park at the top of the mountain, where the temperatures are 5-10 degrees cooler than below.
Cottonwood is also an interesting town, in particular Old Town Cottonwood. Jerome and Cottonwood are booming with a local winery industry and restaurants and tasting rooms. One of the more active winemakers is Maynard James Keenan from the bands Tool, A Perfect Circle and Puscifer. He has a tasting room and novelty store/barber shop/vinyl record store up in Jerome, and he has one or two tasting rooms and an Osteria in Cottonwood. Have never seen him at his shop/restaurants, and he keeps a low profile.