Ok, so someone actually IN Ohio probably ought to join into this convo..... me! But no, I'm not originally from Ohio. I grew up in Texas, and lived 4 years in California before coming here. It astounds me that I have actually been here for 20 years now - that was never in the plans!
So yes, there has been an exodus from Ohio, particularly from certain areas, like the one I live in. A few years ago, the "city" that is the little 'burb which I live in published a paper indicating that, as of the date of writing, over 600 homes had been abandoned YTD. It was only 6 months into the year at that point. Yes, unemployment is the primary motivation. So many businesses, including small mom-and-pop shops have left here. But that isn't true all over the state. In the Cleveland area it is, to be sure - no surprise that LeBron decided to ditch it again. So much of the exodus, including his, is really due to poor management decisions, particularly at the local level. Where are the parting Ohioans going? Yep, wherever they either a) can find jobs, or b) have family. It's not just the older manufacturing/industrial types leaving, but even college grads.
Still, other than economy, Ohio is not a bad place to be - as long as you're not in an area that gets lake-effect snow. It's very, very green in the warm months, and that's all over. Take a look at the USDA plant hardiness zone map. See that green band? Notice now it makes a scallop shape, such that most of Ohio is in the green, while other states right next to it in the same parallel to the equator are in the blue? It's pretty cool to find yourself driving on a highway in an area that looks like you're in the middle of a forest, when in reality there are houses and such very close by. Needless to say, it's a very agricultural state and you can find all kinds of unexpected things growing here. There's a lot of outdoor recreation, too. If you like hiking, camping, kayaking and such, you can find it here. Yet it's also not bereft of cultural highlights, either. Cleveland (surprisingly) has a world-class art museum and also a very good theatre district. Columbus, Dayton and Cincy are currently much more active in that regard, but each is very different.