I am using a CR-10 S4 with Inland Filament as it is easily accessible to me from a store front Mircocenter. My Slicer of Choice is Simplified3D. I purchase the S4 so I can print full helmets without the need to glue parts together. I do use painters tape on the bed when printing delicate or very long prints. Longest print so far has been 180 Hours.
I love the Slicer as I can adjust the features like support, layer height or multiplier for my prints. Having the ability to tweak a setting and re-run a print has become invaluable for me, as I am able to learn what each setting can offer to a successful print. The only downside to 3D printing as I'm sure many Maker would agree is the time we have to wait for that print. LOL!
When purchasing my printer Chris at http://tinymachines3d.com was amazing and helped me select and purchase my 2nd printer.
I can't say enough about Thingiverse at https://www.thingiverse.com/ is a pool of resources and STL you can pull and test your printing capabilities.
Another great site would be My Mini Factory where you can find or purchase many amazing models like my Batman Kowl, https://www.myminifactory.com/object/3d-print-batman-cowl-20596 Everyone wants to be batman!
And of course Do3D.com for the amazing newletters and models posted weekly.
Currently I am working on 3D Printing Personal Protection Equipment for local doctors through the organization "Mask for Doctors" at https://masksfordocs.com/ . We are printing the Prusa Face Shield, I have printed close to 100 frames on my CR10 and sliced Clear Plastic for the shield itself. The picture of my printer is building 4 face shield frames at a time (see picture below). If you have time and would like to donate your time or prints, please visit the site and locate your local representative.
Thanks for doing the Giveaway and stay safe and healthy!