there's no worst feeling than dropping $50 on an assortment of packs and getting nothing. So I usually buy singles from eBay, but I will still put down a 50 at my local shop once a month if the bills are paid.
I don't have good luck with baseball. But football, somehow I get Roethlisbergers in every pack.
I put a retail box of Topps Draft Picks and Prospects Football on my Visa from Target. I open it at home, I get a Chris Perry Class Marks auto ($50 at the time) and a Roethlisberger Gold Chrome ($50 as well). This is before the season, and I have the nerve to compain that all I get is Roethlisberger, why can't I pull any Manning's? Well the Big Ben is now worth $100, and while I want to see the Pats win it all again, if the Steelers do, I know the Ben will go even higher. So it would give me slight consolation.
My best baseball pull, when these first came out, I bought 3 packs @ once of 2003 Bowman Draft with one Chrome per pack. My Chrome pulls were a Kotchman, a Francouer, and an Upton.
One more story, I swear. ..
My friends and I play Hold Em for our cards. Usually match up a few $5 and $10 cards with a $20 thrown in. Nothing life altering. We decided to put in one nasty card each for this pot. They were an 85 McGwire, an 89 UD Griffey, a PSA 8 87 Fleer Bonds, and aVG/Exc Patrick Roy rookie. I had to take a picture of that. I won those. I cut the picture, put it in a top loader, and put it in my box. Whenever we get together, I take it out an say "Check this one out!" They fall for it every time...