Thanks. I don't think of it in terms of being a personal collection, as I just consider it my collection. In other words, I collect cards and don't really specialize, except for an attempt at the Packers, most of which were bought in eBay "lots" a few years back. A lot of the other cards came from boxes, which means I have tons of base cards and inserts too.
One thing I'll probably never do again is purchase rookie boxes. I checked-out the players I have and quite a few never even played a game in the NFL. They might be signed by a team, but only play on the practice squad. I still like their cards, but they are essentially worthless. So, when I buy a box and don't get a "hit"...one of the eventual "stars"...I more or less wasted my $$$, and that happens too often with those boxes lol
Eh, I had to try once in a while, and occasionally I got lucky. I got some great autos and rookies from Topps Pristine ($30 a pack), including a Shaq auto and a rare Dwight Howard that's probably worth over a $100, so I didn't do too bad overall. I got that Jordan from a cheap box, and that's worth some $$$. I bought a few packs of Just Minors once and got an Alfonso Soriano rookie that made my day.
Aside from $$$ value, which is important, I appreciate the cards for their historical and artistic values too. From that perspective I'm content with what I've collected.