If on a full 9 player table, I would only shove TT+ UTG unless under 10BB. Middle pairs are only called by hands that are coin flips or larger pairs. You will get called by one of the 8 remaining players about 1/3 of the time, about half that with TT+, the other half with two cards over Jacks.
These are possible shove spots for me under 15BB. I may shove tighter or looser, or I may min raise certain hands.
UTG - TT+, AQ+
UTG+1 - 99+, AJs+
MP - 88+, KQs
MP+1 - 77+, KQ
HJ - 66+, KJ+, AT
CO - 55+ QJ+, Axs
Button - pairs, JT+, Ax
SB - any two cards
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