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The other responders' answers notwithstanding, I think that since you learned the game and played the game with a house cue between the ages of 12 and 19, you simply feel more at ease with it. I think the other responders' answers regarding shaft size, cue weight/balance, etc., probably have some merit, but I think it's mostly in your head. I recall getting myself a purebred cocker spaniel a number of years ago. As cute and snuggly as she was, she didn't hold a candle to the old mutt I had when I was a kid. Same kind of thing, I think.
If this was happening to me, I think I would try to find a sneaky pete that has all of the characteristics you find most desirable, i.e. get yourself a mutt!