For the detailed answer, please see my post in the topic "How did you find out about RPG Maker?".
That pretty much covers everything you're asking.
For the short answer? I simply like the program and haven't found (or looked!) for anything better to use. There probably is something better on the market, but the current maker caters to pretty much everything I need as it is, so I see no need to go out and look for something newer or better. What would I like to see more of? To be honest, I'd like to see more tutorials and topics about "how to make the most of the RTP and the Content Packages you can purchase". Seems like the attitude on the forums is far too often "always use custom content for everything despite having no skill, no talent, and no money to do custom content". Obviously, yes, we should customize and use original content as often as possible... But, I'd just like to see more topics, tutorials, and attitudes on "Okay, here's how to make the most of what you're given even if you don't have any talent, skill, or money to upgrade beyond the default". I would welcome that, personally. Then again, maybe I only want that 'cause the vibe 'round here feels very "pro spend money and pro pay people to do work you need" to me. That could be personal bias, to be honest. There's nothing wrong with that, but I just feel like we should cover the other end of the spectrum as well.
What community related activities do I like? Eh, I dunno, I don't participate in them. I sometimes wish I had the talent to do the spriting and such for those contests, but I just don't. Maybe some writing contests would be interesting? Not like, "write an essay" or something, but perhaps world-building things and such. I dunno. I feel a bit left out of the contests since my talents lie more in the written word instead of the drawn line. I think they're pretty good for those who can do such things, however. Do you have music creation contests? I don't think I've ever seen one, but if you don't, maybe add some of those too? Stuff for the entire community to get behind would be kind of neat. Obviously, not all at once... But, to cater to all the major artistic talents that frequent the forums.
Beyond that, I guess I got nothin'. Take my two cents for what they're worth, ha ha.
EDIT: Fixed a few errors with my writing and added a sentence.