I'm surprised at the hate here for Firewire drives.
I bought a new LaCie 1TB bus-powered firewire drive to use as a time machine drive with my MBP just a few months back. The one I have is USB 3 and Firewire 800, although I use it just as a Firewire drive as my late 2011 MBP does not have USB 3.
I could have bought the same drive in Thunderbolt, but there were a number of disadvantages. I'd have been looking at another $50 or so on the same drive for the same capacity, plus an extra $30-50 for a thunderbolt cable. On top of that, I often use a secondary display when working at my desk-a time when I want to have my time machine drive connected. Most of the lower price thunderbolt drives I see only have one thunderbolt port, so connecting both the monitor and TB drive is impossible(unless I want to drop down to USB 2 speeds).
When I use external keyboard with my MBP, I much prefer the older styles to the current "low profile" aluminum one offered. I'm using the A1048(made from 2003-2007) with my G5, and have a second one of these that I use with my MBP as the occasion warrants. I use the 2000-2003 M7803 "Apple Pro Keyboard" with my G4s and a couple of other computers.
I'd really like to pick up some of the Griffin ADB-to-USB adapters, as the Apple Extended Keyboard II remains one of the best Apple keyboards I've ever used. I'm getting ready to write my dissertation, and would use the AEKII to type out the whole thing if I could get it set up correctly. I find the AEKII to be more relaxing and less tiring than IBM model M to which its often compared.
I don't think it counts as "old", since Apple still catalogs it, but all of my desktop Macs have the A1152 "Mighty Mouse"(now just called the Apple Mouse). I also have a spare that stays in my desk drawer for use with my MBP. I much prefer this mouse to the Magic Mouse.
For OS9 use with a G4, I sometimes use a M8733 "Apple Pro Mouse" as having a multi-button mouse doesn't do any good. For pure simplicity and ergonomics, I love the ADB-II mouse, although generally only use them with ADB systems under OS9. The ADB-II mouse fits my hand better than any other Apple mouse I've used.