I haven't had cable in at least 10 years, & about that long for satellite. For subchannels, I watch the following, & not in any peticular order:
Livewell Network for 2 shows on WLS-TV 7.2 (unfortunately WLS-TV is a dual 720p HD station, & this channel literally looks like crap).
Antenna TV on WGN-TV 9.2
WTTW Prime on WTTW 11.2 (locally programmed 24 hour primetime channel) & Create on 11.3 (WTTW Prime to me is better programmed than the main channel, & watch that more).
Mhz Worldview on WYCC 20.3
Bounce on WWME-LD 23.2
U Too on WCIU 26.2 (time shift programming from 26.1, along with shows only carried on that subchannel), MeTV on 26.3 & WWME-LD 23.1, MeToo on 26.4 & WMEU-LD 48.1, & This TV on 26.5
Qubo for some of the Filmation cartoon on Qubo nightowl on WCPX 38.2 & Ion Life on 38.3 (when I'm that bored, though I've seen practically every episode of every show they carry).
Lastly, America One on WOCK-CD 13.4 (only all English language network on this station, since 13.1 is Mega TV & 13.3 is LATV, both Spanish, & 13.2 is a simulcast of WOCH-CA, & that carries Arirang, though I've seen KBS as well:Korean).
If I ever can get WPVN-CD, then I would have access to RTV & Polvision (locally programmed Polish language network)