A big challenge with ANG units is that they sometimes go away or transition to something entirely different. The GA ANG lost their B-1's not too long after getting them and they transitioned to E-8 JSTARS. Others have gone from F-16's to C-130's, and more recently others have gone from manned aircraft to unmanned.
I once got to observe the State Adjutants General meeting where they shuffle units. Of course TAG is (mostly) an appointed position so they do what the governor asks. I learned a great deal, the first being that most governors don’t want “cool” Guard units, they want units they can use in an emergency. Of course all of this has to fit within the broader needs of the armed forces and their manpower and mobilization plans.
On the AIr Guard side nearly every governor wanted C-130’s. They were happy with army helicopter units, but larger states often bartered for heavy lift (-47) units.
@Flash has a point about SO aircraft. Interestingly enough Oklahoma once had a SOAR MH-47 unit that was a popular spot for guys leaving the regiment - but that went away when Big Army bungled the Desert Storm mobilization. Massachusetts lost one of the best F-15 wings in the country (and had them replaced with an intelligence wing that does something with unmanned aircraft) all because the governor’s big donors on the Cape were tired of hearing jets all the time. My visit was before the AF had V-22’s but I don’t think there are any V-22’s in the Air Guard, but I think they would be popular with the governors.
On the ground side military police and engineers are by far the most popular, armor and artillery the least popular. Larger states get division sized elements, but even those often have elements in neighboring states (the 29th Infantry Division is a good example). I remember both Texas and California working hard to keep their divisions while other states couldn’t wait to dump their armor units. When they came out, Maneuver Enhancement Brigades were quite popular. On the army air side, every state gets helicopters (I believe at least a battalion) who are scattered elements of larger Combat Aviation Brigades.