Hi Joseph, welcome to the Linux Mint forums
Thanks for joining the forums! MATE is indeed groovy, I'm running it as my main desktop as well
I'm not much into web development these days, but Linux Mint should offer you everything you need. From nice editors, like Bluefish and Geany, to running web servers and such on your desktop for experimenting. If you need any assistance, have a search first as there are a lot of users dabbling with web development on these forums. The "Software & Applications" forum is a good place to look, or to post questions about getting programs to work if you have any issues.
Be sure also to check out the Community
website (ideas, tutorials, and hardware and software reviews). You can also chat in real-time with other Linux Mint users. In the Mint Menu, in the Internet section, start the application XChat IRC. You will automatically get connected to #linuxmint-chat for general chat and #linuxmint-help for support with other Linux Mint users.
Have fun with Linux Mint.