tbh it's really up to you how strict you want to be. as you're not trying to lose weight is there another particular problem that you're trying to solve? or is it just for general health?
e.g. if you feel that you're craving sweet flavours all the time, then you might want to cut out refined sugar, so cakes, sweets, syrups. you could extend this to fruit too as most is quite sugary, berries are lower in sugar
or if you feel you are getting blood sugar highs and lows and you want to avoid that, then you might want to think about reducing all sugars (carbohydrates), so include potatoes, rice, wheat, bread, pasta, even the carbier vegetables like carrots and peas if you want to be stricter, but if you don't want to lose weight then that might not be necessary
both the blood sugar highs/lows and the sweet flavours can contribute to addictive behaviours, but different foods will be more or less "triggering" to different people. bread and cakes may be riskier than carrots, for example 
you need to see what works for you really, both in terms of what makes you feel at your best, and what works for your lifestyle
maybe if you gave an idea of your diet and what you're trying to achieve then people might be able to point out what sort of changes you could make