It's sad, but I like clonazepam the most simply because of how much it has helped me. The long action gets me through the whole day nicely. The downside would be cognitive impairment. I feel mentally dulled and my memory is quite terrible.
Lorazepam really sounds interesting... CEVs? I might be switching benzos soon. Temazepam also sounds nice...
Diazepam has never really seemed to have much of an effect on me.
Oh, I'm not prescribed any of these. I don't try to use them for recreational purposes that often, apart from to potentiate other drugs, mostly alcohol.