I've just started (probably way too late) with the Corgis myself, have about six so far. They're fun out of the package too.
Believe me, when I started collecting this line, I was sorely tempted to open them. The thing is, I really dig the packaging on these. When displayed together it's almost an evolutionary chart on how much Batman has changed in the last 60 or so years, not just in his rides, but his appearance. Whenever someone who knows nothing about Batman sees the Corgis, they're amazed because most had no idea he's existed for as long as he has.