I rather enjoy posting my thoughts after completing stages in NSMBU. Such a simple thing that's actually really fun. Makes me feel more like a participant in the community of players.
For now, I have forgone adding anyone else as friends on Miiverse. Not so much because of limitations, but rather because I just don't want to impose on anyone else if they want to be more strict about their friends list.
That said, I am "following" a lot of you because I really enjoy seeing all your thoughts, drawings, and other contributions. Keep it up!
If anyone is looking for more Miiverse friends though, I have plenty of space on my list. As of now I'm content with NSMBU and NintendoLand so I won't be doing any online gaming specifically, but every day I post something to Miiverse so I 'm not bad if you're just looking for a relatively active community person.
See you all in the 'verse!