I am using Cubase 8.5 at this moment, was playing around with a not so legal copy of SX3 for sometime and bought Cubase Artist 7. I upgraded ever since and when 8.0 came out I upgraded to the pro version.
Been using Cubase for 5 years, I think. Started with a bundled in version, I got with my first Audio Interface a 'Tascam US-144MKII' (still use it as a little demo set up in my living room, recording to Audacity). Tried a few other DAWs, Cubase felt the most intuitive to use.
Upgraded to Artist, after 3-4 months and finally upgraded to Pro a year and a half ago. Currently using 8.5. Like other posters, I use UAD, some Waves plugins - I'm really impressed and enjoying playing with with iZotope plugins.
I'm a Cubase Pro 8 user. Been on Cubase for a few years. Had the occasional hickups every now and then, but customer service in Australia was great!
I love the channel strip and particularly love Quadrafuzz V2 - multiband saturation really sweetens mixes.
Those of you using Cubase Pro 8.5 - do you think that the upgrade really worth it from Pro 8?
The upgrade is minimal but the cost is a small price to pay. Additional Midi and editing feature plus general upgrades elsewhere (although small). Its probably worth waiting until Cubase 9.0 comes out as that will not be long.