To some they are a mid life crisis x 10 combined with ocd / icd disorders they are behaviour changing and can destroy relationships and put you out of pocket by a hefty sum
To others they are the best fun they've ever had
Some say they arent affected at all. What they mean is they are really but they dont want others to know.
Out of 50 people I know personally who have taken them 44 admitted to behavioural issues that affected their lifestyle. The actual effect is subjective to your life and circumstance. If you are a heavy gambler or into swinging for example you may not notice any particular change. Some have problems with online games etc. or you may find you become obsessive about a hobby or very impulsive. If you are doing unusual things with no plausible reason its likely a side effect and you need to come off them.
Doses as low as 8mg requip or 2.1mg mirapexin have been known to cause significant changes in behaviour.
Maximum dose is 24mg requip 3.14 mg mpex = 4.5 x 0.7mg tablets; dont exceed the dose. (mirapexin leaflet used to have a rider saying your dr could exceed max dose but that has long gone.)
The higher the dose and the longer you are on them the harder it is to come off them and the more likely you will have a permanent behaviour change. This is not necessarily bad but it is likely; risk taking is a common behaviour change, any loss of fear may stay with you.
Coming off them can cause irritability and depression, stopping them abruptly for a length of time can make you seriously ill or kill you On the plus side they stop some muscle pain and can help with depression.
They arent as good as levodopa and the time they keep you off it is usually 2 to 5 years
If I had my time again I wouldnt touch them. Dyskinesia was a big fear with levodopa and still is, I believe it can be managed better and is a better drug all round.