ARgh! I had a response all ready & then IE froze.... rrrggggh!
Anyway, no, you're not too big of a geek! (who say's geeks need to be "cool" anyway?) I've wanted one of these since they came out but I literally have nowhere to put something so large.
In answer to Zombie's question, we display it of course! It's not really any different than hanging a picture on your wall or putting a sculpture on the mantle. It's something you like to have on display in your house. I'm certainly not saying toys are fine art, but the basic principle is the same. Now, certainly, some collectors go overboard letting the collection take over their homes and lives. But within reason, it can be a fun hobby just like anything else.
I collect OT Star Wars, Indiana Jones, and Godzilla. I don't buy everything, just what I like, when i can afford it (actually my wife buys more for me than I buy myself these days). I have one room in my house (the spare bedroom, which is also our "office" area) where I display my stuff. As my collection gets larger, I either rearrange things to make space for new items or I put something(s) in storage to make room for something new. My wife collects antique kitchenware & dishes which she displays in our dining room buffet cabinet. There's not nearly enough room for all her dishes so she rotates them in and out of storage, periodically changing her display. As my collection outgrows my space, I'm adopting the same practice.
I've never understood people who seem judgemental of toy collectors when it's often deemed fine for someone who is obsessed with sports to have a room dedicated to sports memorabilia (somehow that's more "grownup").
Anyway, you're not too big of a nerd. Though if you decide you only need one, I'm sure i could find SOMEWHERE to put one...
Here's some clickable thumbnails of my room for those interested.