A combination of "Bad Rats: the Rats' Revenge" with "Barbie Dreamhouse Party", this will be the ultimate best game evar.

Some kind of Sports RPG game

Simulator Simulator.

Surgeon Simulator-like controls where you control the hands, which you use to press buttons on the in-game keyboard in order to control the simulator happening on your in-game computer screen.

LARPG + Tower Defense + Item Shop Reccatur. You have to wander back and forth thru a store trying to find one item, but you'll end up travelling about a mile while browsing thru everything. I call this game, Ikea.

Trading Card Simulator.

I want to be better prepared for the real thing!

Make a game in which you simply run through an office building and kill everyone, but you can't reload any weapons, so you have to throw them away (like literally throw). So the entire time people are running and shooting at you and you just have to keep dropping and switching guns the entire time and throwing guns and staplers and letter openers at people in order to scavenge your next 30 rounds of ammo. The game never stops. Do not implement a cover button and make everything destructible a la Red Faction.

There is also no plot whatsoever other than you are in a building and must escape somehow and people are attacking you.

Know your strengths and weaknesses. You are bad at making original ideas? Remember some good and fairly simple game from your childhood (a game that you still enjoy) and try to create a clone/remake/spriritual remake/faithful tribute to it. This should be a game you know really well and understand what makes it fun, so you can capitalize on the most successful aspects. Don't aim too high - e.g. make Dangerous Dave, not X-Com, but don't choose genre just because you think it's easy to program (for example we have tons of scrolling space shooters on Greenlight made by people who don't know and don't love scrolling shooters).

Sorry for not giving you more specific advices, but it's really up to you. You can make take a common genre and add a unique setting, or vice versa. It is pointless to recommend you to make a point-and-click adventure if you are fond of racing games.

Just make something you yourself would like to play.

Skyrim 2

I have so many ideas, but I am making games, well trying to make games myself..

Battlefield: The One Time In The 420 Farm.

An FPS where you'd be a soldier during the war, BUTT, not the usual BS games tends to put us into, more like a support soldier, instead of a super rambo warrior who kills a whole army by himself ( even though I fucking love that too I have to admit :P I'm a brainless killer in most games :3 ). For example a field medic, who's got to go a rescue people, an engineer, that sort of things.

Franz Kafka Punching Simulator. The game is about punching Franz Kafka.

Bad rats+big rigs. What could go wrong?

Exploaration. You generate a random world using algorithms like diamond-square algorithm to generate a heightmap for the terrain. Leave the player to explore.

Dawn of War 2 meets Civ 5. Expand your influence on a sector, capture cities on multiple planets, engage in RTS combat with diablo style loot and level-ups for the heroes.

Simulator Simulator

Hat simulator? Oh wait there's TF2 for that.....

What about a pants stealing simulator? Oh yeah I forgot, DayZ already does that....

What about Dungeon Keeper? Seriously just do an updated version of that, don't pull the EA shenanigans and everyone will love you.

2D rpg.

Randomly generated ( roguelike ) space shooter or tower defense game, with similar item system to Diablo 2.

Copy pasting from one of my own posts:

Disaster Simulator

Disaster Simulator is a pretty simple idea, but a very complex game.

The game is all about sandbox, free roam, open world, and of course, disasters.
You will start by selecting a starting location. Any location worldwide, like tropical island paradise, cities, forests, deserts... Then you will choose out of a vast array of disasters, including: Hurricane, flood, bombardment, zombie apocalypse, earthquake, volcano, tsunami, tornado, war, and many, MANY other. Or, you can simply set it as "Random", and face the unknown.

Then you can start playing. The game's events will be randomly generated, so you cannot know when or where to expect the disaster to happen. You must find shelter, weapons, or even food, depending on your difficulty settings. Then, it's neverending fun... Survive the zombie apocalypse, or find a boat to stay alive when the tsunami strikes, take cover underground in the dark metro lines...

You will also have the full control over the settings, options, and setups.
You may choose whether to need food and shelter, or not. You can also choose to be invincible, or to be a weakling. You can spawn with a full armory, or with only a rusty fork. You can also turn off disasters completely. The possibilities would be limitless, the world would be yours to shape.
And also, there's destruction. Lots of buildings crashing down, gas stations blowing up, and bridges falling into pieces.
Oh, and did I mention the possibility of throwing in co-op multiplayer online, or local? Also Massively multiplayer online, with thousands of players? :D

Starcraft 3