From personal experience, being a mod is fun but sometimes the responsibilities will get to you in the long run.
In 2011 I modded The Welcome Lounge. It was...something that I never expect to get given that I barely started to get active in that section at the time, but that encouraged me to be active a little more. It was also due to the fact Hiidoran needed backup. xD To put it short on how I became one, I fainted at the PM invite, screamed at the screen, and just...waited for my name to change to bold.
I resigned because I lost interest at the time, as well as I needed to catch up on life. I didn't want to focus on modding as much anymore.
AND THEN WE FAST FORWARD TO FEBRUARY where I got re-modded once again, this time in Fan Clubs. I literally sobbed at the skype convo. At this point in time, I managed to set my time straight, I can access PC anywhere, from phone to tablet to school computer, and all that. And FC&G is a laid-back section, so it's less stressful for me.
To be quite honest, becoming a moderator in a forum like PokeCommunity is something I never thought I'd be. I was afraid I would mess up, be rough, and be terminated on the first day. Being a moderator is like...a department manager position at a store. You're in charge of your own section and what happens in said section. If something happens in your section, or if someone has a question regarding your section, people will look up to you. It's a fun thing to do, and if you love to help people, you will love being a mod. However, bottom line is that..it's not an easy job.