Yeah. Sometimes, I'd say call in Hand #1 because if UTG calls which he will most times, he has a hand. A case can be made for a CRAI on the flop because if he cold calls PF, there'll be 7500+ in the pot, and I'd give him credit for a hand. I'd push maybe 60% of the time and just call maybe 40% of the time. This early, I'd push about 80% of the time to give my re-steals more credit when the blinds get up, but moreso when a short stack pushes after a limper or two and I iso-push with like 88 or 99.
Other two hands are good. Pushing the A3 wouldn't be wrong too much, but you've been pushing a lot and 3-handed pushes have little to do with the cards. If you're cold decked and you get down to 50k, you'll need credit for your button and SB pushes, so you don't wanna wear out your welcome.
Hand #3 is perfect. You can't play 5's postflop with that stack.