I had a 360 before I turned it in for a PS3. I have absolutely nothing bad to say about either console, just that I greatly prefer the PS3, for most of the reasons you mentioned. I simply don’t give any credence to the “the 360 breaks all the time!” argument - it’s really not all that relevant.
Online Play
When I had the 360, I was never all that interested in spending $35-50/year for the privilege to play online. I didn’t know anyone online (there’s a solid SDMB group that solves that problem), and I’m just not all that interested in the competitive atmosphere, or spending quite a bit more money to stay on top of the currently-popular new online games (I’m honestly not sure how much of an issue that is). However, since I got the PS3, I’ve played online quite a bit more. LittleBIGPlanet is a fantastic game, with an amazing online experience. And since online play on the PS3 is free, that was a huge plus. I’m cheap, so I give the edge to the PS3 - but understand that the 360 experience is better if you have a group to play with.
Bluray Player
It’s simply fantastic, connects online to receive any and all firmware upgrades, and is a central component to my HDTV setup. It alone was the reason I made the switch, and all else being equal, it is absolutely a reason to spend the extra small amount of cash. It’s also nice not to have yet another component in my entertainment center taking up room.
Media Extender
I’ve found that the PS3 was much easier to set up as an extender than the 360. However, it doesn’t have WMC if you want to replace your DVR via your home computer. The third party media extender programs I use have, I believe 360 counterparts, but I haven’t tried them.
Exclusives
This is all a matter of preference. The 360 has a larger library, but the PS3 has made really really strong efforts in the last year to compete. In the last year, I’d give the PS3 a solid edge in exclusives. I’d look at lists for both consoles and see what is going to give you enough to play. Yeah - I never got to play Mass Effect 1 and 2, which I regret. But I did get to play LittleBIGPlanet, Ratchet & Clank, Demon’s Souls and Uncharted (and I really look forward to Mod Nation Racers, 3D Dot Game Heroes, and a chance to play Heavy Rain). Ultimately, both will give you plenty of options to fill up your gaming schedule.
Controllers
I vastly prefer the 360 controller. Something about the analog stick on the PS3 makes playing Tiger Woods nearly impossible for me. The triggers aren’t as good either. If someone were to put out a PS3 controller in the shape/config of a 360, I’d pay good money for it. I don’t hate the PS3 controller, but it’s just not as good.
The Future
I’m not interested in 3D gaming (okay - I am, but I’m just not interested in buying a new TV…). For the moment, I’m not interested in Natal or Move (the movement-based peripherals MS and Sony are planning to cover the marketshare Nintendo has a monopoly on with the Wii). But if I were to place any bets on which is stronger going forward, I’ll stick with the PS3. Even if a 4th gen console (technically the…8th?) were to come out, I think my PS3 has stronger legs to stand on. You can still buy a PS2 at Best Buy - 360 devotees may say that knocks the PS3’s viability, but I think it just says that Sony makes long-lasting products. Either way, I really can’t see myself going back.