Fine if both players want to be 5k the rest of their lives.
The 1st game shows a funny kind of fighting spirit.

says: "My endgame is better than yours!"

says: "Wanna bet?"

I'm not going to dispute whether these moves are correct---they are in fact not textbook---because I don't think that's what the OP is getting at. But maybe they are boring. This kind of unwillingness to pincer or to allow pincers or to avoid the risk making any kind of weak group is not necessarily incorrect, but it can lead to the kind of game where you are counting the value of each move. People may be making fun of a certain amateur theorist in another thread for caring about the sizes of opening moves, but the openings shown are the kind where that sort of thing matters. The curious thing about that guy is he opens as black on the 7-9 so one wonders why he should care so much, but I digress. I read commentary on a pro game a few months ago with an opening like the ones shown (except with more pro-ish variations) and the reviewer just said that it's painful to play that kind of game because you have to count the score on every move.
I'm biased because I dread such games.
If you want to get out of the book, just get out of the book. Or at least go to a different book. A two-space high approach at move

is at least a different book. (One of Go Seigen's). It's unlikely for most 5 kyus for that to be part of black's plan, but in a club, playing the same players over and over again, your opponents get used to your idiosyncrasies.

Forget to approach at

? Do one at

, maybe knight's approach. That's a book, too. A really, really, old one.

For black, well it's even easier. There's always that 7-9 after all...
Both players should play as in the following game if they want break out of a quiet style. Ch'oe Ch'eol-han played these first 5 moves against Yi Ch'ang-ho and other players a lot in the early 2000s and won a lot. On the GoGoD CD you can find pro commentaries on a few of them. In this game I have truncated past move 66, which, coincidentally is the when the empty 4th corner is finally occupied.
White: Yi Ch'ang-ho
Black: Ch'oe Ch'eol-han
47th Kuksu Final, Game 5
2004-03-02
- Click Here To Show Diagram Code
[go]$$B Moves 1 to 10
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . 4 . . . . |
$$ | . . . 2 . . . . . , . . 5 . . , 1 . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . b . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . 7 . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 6 . . . |
$$ | . . . . . . . . . . . . . . . . a . . |
$$ | . . . , . . . . . , . . . . 9 8 . . . |
$$ | . . . . . . . . . . . . . . . 3 0 . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
White, BTW, tried all kinds of stuff besides

., like 'a' and 'b'. Doesn't matter. Ch'oe is a Rottweiler.
Later...
- Click Here To Show Diagram Code
[go]$$B Moves 61 to 66
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . O . . . . |
$$ | . . . O . . . . . , . . X . . , X . . |
$$ | . . . . . . . . . . . . . X X . . . . |
$$ | . . . . . . . . . . . . X O O . . . . |
$$ | . . . . . . . . . . . O O X X . . . . |
$$ | . . . . . . . . . . . O X 4 . . . . . |
$$ | . . . . . . . . . . . O X . . . 5 . . |
$$ | . . . , . . . . . , . O X . . , . . . |
$$ | . . . . . . . . . . . O X O 2 O 3 . . |
$$ | . . . . . . . . . . X O O X X 1 X . . |
$$ | . . . . . . . . . . X O O O O X . . . |
$$ | . . . . . . . . . . . . . O X O O . . |
$$ | . . . . . . . . . . . X X O X X . O . |
$$ | . . . , . . . . . , X . O X X , X O . |
$$ | . . . 6 . . . . . . . . O O X X O . . |
$$ | . . . . . . . . . . . X . . X . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Finally it's big enough to take an empty corner. I'm not saying a quiet, solid style is wrong. Please, don't take it that way. Just, you know, grow some...
Let's pick apart how the earlier choices in the above game are different from yours in spirit. First

approaching instead of taking an empty corner. White doesn't have to do this. This is a komi game. White can hang back and take the 4th corner like you did. No one can criticize that. But what does white do in this game? White approaches like it's some kind of pre-komi game. It keeps black off balance a little. White even makes the low knight's approach. White is not afraid of a pincer.
What does black do? Black can take an empty corner. It's big. It's normal.

chooses a severe pincer. Seriously. It's like he did a web search for "most severe pincer" then played it. So the textbook says you're not supposed to tenuki from this pincer, because black has such a good move to seal in. So does white respond? Nah. White counter-approaches with

. Black can tenuki or respond with a knight's move on the bottom. It's normal. It's stable, makes a base. Nah. Black pincers with

. Finally white has to defend a little and attaches with

. But really this has another motive, too...
It's just a different way of thinking. If your opponent's groups are as weak as yours, you're fine. A few more pro continuations from the first few moves: