You need no introduction about just how disappointed I am with my Wii. My wife and I play Mario Kart on it semi-frequently, but other than that I only play old GameCube games on it. There are only a handful of new Wii titles coming out that have my attention, and I will pass on them entirely if they don't score well with the critics.
So I've been playing all the GameCube titles I passed over back in the day when they were full-price. (Admittedly, I'll probably be doing this same thing a few years down the road once all these halfway-decent Wii games will be cheap.) However, I'm just about of decent titles that are worth playing. My recent forays have been Splinter Cell (good, but not quite my style), Second Sight (underrated hit) Geist (it had it's moments, but isn't too impressive overall) and now Enter the Matrix (utter garbage that I don't even want to finish but will anyway.) Next up is Bloodrayne, which I've already purchased. The others I'm still looking for are Resident Evil and Resident Evil 0, and Timesplitters 2 & 3.
Beyond that, I'm about out of GameCube time. So the time has come. I am prepared to finally give up my Nintendo exclusivity. I am ready and willing to purchase a PS2 and delve into its massive library of games I always drooled over but passed on time and time again. Granted I can't justify the purchase yet (being unemployed and recently married, my wife would kill me if I put the money down on another video game console), but I think it will happen within the next year.
So my question to you is this: What games should I get? I already know I'm going to get all the entries in the God of War, Devil May Cry and Metal Gear Solid series. Beyond those, what other action/adventure and first-person shooters titles should I look into?