Photo Viewing software

I view my photos with IrfanView, a free but full featured program that offers the following features:

• Very quick to load,
• Delete photos with 'delete' key
• Browse between photos with left/right keys
• Rotate photos (using JPG EXIF flags) using hotkey
• Full screen view with smoothed resampling.
• Plus lots of other features I almost never need.
• Thumbnail mode (but I prefer ZoomBrowserEX for that)
• Hotkey to rename file.
  
• No ads/malware.
  

There are lots of photo viewing programs, but IrfanView is my favorite because it's full featured without being bloated.