[bzxcvbn]

Powershell defines tons of aliases to mimic bash, eg rm is an alias for remove-item, ls for get-childitems, cat for get-content, etc. What I like about Powershell is that arguments gets aliases too, for example -cf is the standard alias for -confirm.

[justsomehnguy]

The best thing with parameters in PS is what you don't need to write parameter name fully, and it is supported everywhere, while only some *nix tools support it (most notably 'ip')

[ElectricalUnion]

The cool part about those aliases is that invoking Get-Help on them (say, Get-Help ls) will show you the relevant documentation of the non-aliased full commandlet name.