Hey man good to hear you've moved up to 25NL, hope things go well up there.
What you say is good advice, I tend to have a very static flat call range from the blinds {AJ,KQ,AQ,JTs,low PP's} against most MP openers but I should probably fold most of this against an unknown range and maybe call the PP's. Guessing with 100BB stacks just calling from the blinds is going to tough to make profitable without good post flop skills and reads.