After my ColecoVision (with Donkey Kong!), I've only had Nintendo systems. (I got a Game Boy Pocket only after Pokémon, so I guess I have all of them except the original Game Boy, Virtual Boy, and Game Boy micro. But I have a Game Boy Pocket, GBA, and GBA SP so technically I'm only missing out on the VB...and I rented that and had my fill, thanks.) I'm not against playing non-Nintendo game consoles, and have often done so, but I've never actually felt a need to own those other ones. Plus, my PC is decent so I play so many games on that, reducing the need for the other current consoles... Nintendo actually knows exclusives, they do.
A couple years ago my brother bought a Dreamcast pretty much for Marvel Vs. Capcom 2 and Shenmue...and it came with a bunch of other Dreamcast games. I think we only finished MvC 2 (and somehow lost our save) and Space Channel 5, though. I've been meaning to get into RE:CV and Ikaruga, actually...
If my brother got a PS2 after all I'd probably just want to play FF X and FF XII, and likely also the Kingdom Hearts games. Maybe FF X-2. I've played the first nine FFs (more than most FF "fans" can actually say) so I might as well continue my streak, though FF XI doesn't interest me much. Too bad FF isn't as good as it used to be, but I'd still play them.
Other than FF stuff, most other stuff on the PS2 seems too generic, doesn't interest me, or has a PC version which I likely have played already. Maybe MK: Armageddon would be something to check out, and my brother wants Soul Calibur III like I mentioned before...but it's still not enough to make me desperately NEED a PS2, or I would've gotten one already. I guess there are quite a few RPGs other than the FF ones that I could also consider...but still...
When you reduce game libraries to what you would actually consider playing, it doesn't matter how large the whole library really is.