My pride and joy is my crankin' old system which I use daily. It is pretty minor compared to what most vintage gear collectors have, but it works.
I have an excellent condition pioneer
SX-1050 (my 1250 got stolen) for my amp/preamp. I replaced every electrolytic cap in it with new modern stuff, replaced some aging transistors (diff pairs), and replaced the light bulbs with LED's of the original color. It is from the late '70's
Connected to it is my trusty (yet not rusty) old Akai GX-270D-SS which is a 4 channel quarter inch reel to reel from the mid '70's. I bought this thing broken in the early 80's, fixed it and have been using it ever since. It had it's first major meltdown last year - Chad graciously offered his up for parts - luckily I fixed it and life goes on.
I also have a Sony TC-K850ES cassette recorder 3 head 3 motor (with remote control) - probaby mid 80's. It's hard to believe cassettes are vintage and being collected by some people. No - really - people are collecting cassettes now. I rarely use this, only occasionaly to copy a tape to the computer.
Then there are my two turntables currently hooked up to phono 1 and 2 since I gave away my mixer. They are both numark direct drive DJ style - but they work well enough for me.
I also have the first Onkyo CD carousel as well as a nakamichi cartridge style CD changer. I use the onkyo occasionaly. The Nak is doing time on it's side out in the garage.
All of that is connected to some old sealed low efficiency infinity speakers that sound great.
I don't know why I like the old gear, but I do - I crank it every day waiting for something to pop. I listen to the same tapes over and over again. I record new tapes and play them over and over again. It's like an addiction.
In my living room I have a perfectly good Onkyo TX-SR704 w/ 5 seas Loki coax speakers & a PC dedicated to music and movies, but I never touch it - I always get stuck in my old school room.
I really think that the build quality of the old stuff is better than today, but I do not deceive myself into thinking that a 30 year old system sounds better than a comparably priced modern system. It's just more fun with all those knobs and buttons. And it really does sound better if you have fun with it.