Seriously with a grain of salt, here, since I play FR, not 6-max.

1st hand: JTs UTG is an EZ fold for me. I would open-raise or call a raise with JTs from HJ, CO, BU, SB, BB. So at 6-max... any position except UTG... grain of salt...

2nd hand: I think the open is good, and a fold to 3-bet is prudent. It's going to be hard to play QJs OOP in a big pot unless you hit all or nothing. TPGK and mid pair scenarios are going to be more common and your villain is repping a range that is going to hit the same boards as you, but in a way that has you out-kicked a huge amount of the time.

3rd hand: I like the line and I would call here. A5s plays very well multi-handed and has the backing of 2 deep stack Villains to support the implied odds. Also, 3:1 on a call pre-flop.

4th hand: JTs on the BU is a great hand. EZ call w/o the note.... snap call with the note.

5th hand: Yar! Tha scalawag's a scoundrel and a thief. Tha's YER job. Methinks a 4-bet is in order, Cap'n!