1994 Jeep Cherokee Won't start

My 94 Jeep Cherokee wouldn't start so of course at first I did the 'girl thing' & just kept turning the key, turning the key, turning the key. NOTHING~ It doesn't try to turn over it doesn't click, snap, crackle or pop. It just does nothing at all. After about 25 attempts at turning the key, it turned over without hesitation, no problem, just like nothing was ever wrong with it! Once I turned the ignition off, it was the same ol' song & dance & I'd be stuck at wherever I was at with a Jeep that wouldn't start. Now I went through this a few times on a few different occasions. It seemed to pick & choose when it wanted to start & when didn't. At times it would start right up & at others, it would give me hell! Well, now it's at the point where it doesn't matter if I turn the key a 1001 times. It absolutely WILL NOT turn over. When I turn the key, the door dings, the dash lights come on, but it just wont turn over! I went on a whim & replaced my starter ALL BY MYSELF! (Yes, im proud! Lol!) I reconnected the starter wires properly, it's bolted into the housing perfectly & as tight I could get it. I did everything right~ It still will not start! I am soooo unbelievably frustrated! Any suggestions on what I should try next?