Slot, tray or top-loading disc drives in game consoles?

I was planning on getting a tray load Pioneer DVD ROM, but after reading in a different forum everyone was recommending slot loads

External Blu-ray Drive External Blu-ray Compatible with read BD DVD CD Drive Popular in Internal Cd Dvd Drives Slot Loading All Optical Disk Drives · Zip

slot 787 Blu-ray & DVD Players · Streaming Devices; Home Theater Accessories TV Mounts Dell - USB Slim DVD+- RW Drive - Plug and Play - DW316 - · Dell

slot daya4d LG Ultra Slim Portable DVD Writer $ ; Verbatim External Slimline CDDVD Writer $ ; Verbatim External Blu-Ray Writer $