With no headphone jack inserted to my cell, I usually have to rely on the single left-sided speaker installed to it.
It can only be heard very well if it is lying flat on its back on a solid surface. In midair it is decent at best, but has much better quality if left sitting alone on something such as a table, desk, counter, etc.

When I'm on the go I use my ipod, at home, I have a few choices: my CD's, vinyl, cassettes, or just run iTunes if I'm too lazy to pull out a CD or record.

I now have my Galaxy Mega with 64GB of mem, so I pretty much only listen to that and my computer.

I'm in a big Classical phase right now. Need a better media player so I can ever hear static.

On My computer Via Winamp.

I used to have Winamp installed on my laptop a long time back.
Don't remember why I deleted it though.

Through itunes when at home.
And on the ipod classic, when out and about!

Music channel on tv or Youtube.

I usually use my phone with headphones.
Sometimes I'll on the computer as well. My speakers just recently broke though, so I have to use headphones on that as well.

Phone: built-in music player
Computer: MusicBee