I was at a live cash game last week. Sat down with my usual $100 buy in on the 1/2 table I could not believe what I was seeing I saw so many rebuys cross the table , almost everyone put out another 2 or 300 dollars I couldn't believe it I played 8 hours on my little hundred . Question is was I playing too tight ? Personally I never take more than my initial buy in and if I lose it I go home. Am I wrong for that strategy?
So all you have described is the amount you buy-in for at a cash table.
You have not described any hands for the thread to determine if you are playing "too tight".
I think you are very comfortable with the $100 buy-in...and you should pay attention to that emotional comfort level.
But if you want to test if you can win more with a bigger buyin - try buying in for $200 and see how many chips you can leave the table with.
Also are there hands when you would go all-in and win but you would win more if you had more chips??
And are there hands when you didn't have enough chips to motivate your opponent to fold when you wanted them to fold?
If no then I think you are comfortable with your $100.
But it is difficult to set-mine with 22 or 33 when there is a raise to $15 when all you have is $100.
Alternately I have seen players proudly run their $100 buy-in to $1000 in 8-hours.
Good luck !