In the short end of the stick, I had to vote Slightly Dissatisfied.
While I do enjoy League, and it is indeed a free game, I have poured a lot of money into the game, partially out of greed, partially out of support. However I feel it gets thrown in my face somewhat whenever we go for several days to weeks with downtimes, gamebreaking bugs, and all manner of other problems with the game or client on a technical or balance basis. I know there are many like me who have thrown at least $100+ into League of Legends, so I feel the "it's free so deal with it" model of argument simply doesn't apply, so I also feel the right to complain as I please since I did my part in supporting Riot, and don't feel that the money I gave them is going to good use.
Either a majority of players or a loud minority (who in turn are your most zealous supporters and critics) often talk about things they want; these things are often ignored. New maps are something a lot of people want. So far the only new map surfacing is Magma Chamber, and even then there is no Date of Release as Riot would rather keep us in the dark for the sake of suspense. There is also a LOT of creativity shown in the community, which sadly is not being put to any real use. A good example of using the combined creativity of a community is Team Fortress 2, who now supplies updates to their now free game through the use of community made 3D models, textures, maps, weapon design, etc. etc. etc. Dozens of champion, item, or skin concepts are made on a daily basis, only the skins are even hinted at being looked at by Riot in any real fashion and most of this goes nowhere as expected. If Riot is going to pump out a new champion every 2 weeks, why not use some of the community's more imaginative ideas and make us feel a part of the creation?
(I know about the referral system for making a champion but I view this as a large joke since the likelihood of someone meeting this goal that isn't an insanely popular internet celebrity of some kind is laughable in it's very notion, and due to the nature of that, it still feels separated from the common player.)
In the end a lot of this comes down to feeling separated from Riot, and that in general the opinions of me and fellow players don't matter to them. This rant is probably poorly structured, but I feel the "**** it, do it live" approach is the most honest.