Yes i actively spend my bitcoins. i have gambling habbit and bitcoins really help me do gambling, i mean you can gambling easily using bitcoins, anonymous and easy.
If you enjoy gambling and do not mind losing money, then there is no problem if you gamble. It is not a bad habit.
Yeah if you are winning then its well and good, but if you are loosing then its very hard and bad to digest the failure but that's a part and parcel of gambling, if you are good in it, you should go for it.