Fastmail.fm (for personal email),
Office365 (for more legitimate email),
Evernote (had a paid account for a few years, although I never use it),
500px (for non-professional photos),
DigitalOcean for VPS,
Netflix (not sure if you mean consumer services),
Amazon Prime (I only use it for the shipping),
Hulu+
Apps (a subsection at least):
Mathematica (I'm happy to pay for the Home version),
1Password (although I've stopped using it since iCloud Keychain Sync),
Pixelmator,
Capture One,
NI Maschine,
NI Tracktor,
Pretty much every audio app for iOS (iMaschine, Figure, iKaossilator, iMS-20, SampleWiz, Lemur, Vogel CMI Pro, Animoog, Scape)
Yeah, for whatever reason I was constantly having the following problem in 1Password:
->Whenever I auto-generated a password in the browser extension, and submitted it, 1Password would occasionally (like 1 in 20 times, but often enough to be infuriating) lose the new password into the ether. Like it wouldn't be saved in the "recently-generated passwords" field in 1Password, or update the password field under the "Logins" entry.
So when I got a new laptop, like a month ago, I didn't even install 1Password, but the first time I'd go to any site, I'd manually look up and copy the password out of my backed-up 1Password web page, and then let Safari save the login in the keychain. Over time, I migrated all of my passwords into the Keychain, and now I also have access to them from within Safari on my iPhone and iPad (which having to previously open the 1Password app, unlock it, copy the password from the login, and then switch back to Safari and paste it in), was a pretty big win.
So I'm really happy with iCloud Keychain so far. It restricts my ability to log in to only Apple devices (which for now at least, isn't an issue for me), but I've found it a much better experience than using 1Password.
If I remember correctly even Steve Gibson, who sang praises of the Apple security apparatus saw the iCloud as a weak link in iOS security in his three part series (sn 446 through 448) on TWiT.
I think products like 1Password, Keypass, Lastpass, etc. are a good idea, in that they're making it much easier to encourage a culture of strong, unique passwords for every application and website. Of those, I favor 1Password, because the people making it have a good track record of making generally good security implementations, and being receptive of feedback when issues are discovered. They've been good about updating the apps when an issue is discovered, and haven't made it a super regular occurrence.
They also allow flexibility of storing the password database, which I prefer over the services that store your passwords with them, as you are now reliant on their own security implementations. If you want to, you can store it in dropbox, so that you can access the web-based version anywhere you can log into the Dropbox website. You're now putting an awful lot of faith in the security of Dropbox, but it's an option at least.
But fundamentally, this is a problem which should be solved by the ecosystem providers. Windows, Mac OS X, Firefox syncing, Chrome (I assume Chrome has a way to sync passwords to wherever you're logged into, I don't use Chrome).
I'm comfortable enough trusting Apple to secure all my login credentials that I'm willing to use the built-in functionality. Much like how I use "Reading List" instead of any of the "article saver applications". It works fairly well, I don't have to mess with it, I don't have to give my data to some other company, it just shows up in all my browsers on all of my devices.
Services:
Fastmail.fm (for personal email), Office365 (for more legitimate email), Evernote (had a paid account for a few years, although I never use it), 500px (for non-professional photos), DigitalOcean for VPS, Netflix (not sure if you mean consumer services), Amazon Prime (I only use it for the shipping), Hulu+
Apps (a subsection at least):
Mathematica (I'm happy to pay for the Home version), 1Password (although I've stopped using it since iCloud Keychain Sync), Pixelmator, Capture One, NI Maschine, NI Tracktor, Pretty much every audio app for iOS (iMaschine, Figure, iKaossilator, iMS-20, SampleWiz, Lemur, Vogel CMI Pro, Animoog, Scape)