Bash is the default shell on virtually every UNIX system. Making it very portable across different systems and once you get used to it, you can use it everywhere.

Since this is very mature shell there is a lot of great examples and other resources describing how to do almost everything.

BASH scripting is a rich and robust language.

ls **/*.log for example is supported by Bash if you set shopt -s globstar.

Want to run something 5 times? Write a throw-away loop: for i in 1 2 3 4 5; do date; done
If you need it 100 times? Not a problem: for i in {1..100}; do date; done or: for ((i=0; i<100; ++i)); do date; done
How about emailing yourself when remote server is back online? Sure thing: while ! ping -c1 example.com &>/dev/null; do date; sleep 5; done && mailx -s 'server is back!' me@myself.com