I smoke to relieve stress, it calms me down but in all honesty I could give them up tomorrow. I drink heavily and have been drinking everday since 1/1/11 as a test to myself. I enjoy drinking it's a social affair, it breaks down barriers and there's no social situation that can't be improved with a few beers or a bottle of vodka in my opinion. I've tried every drug offered to me, that's class A, B, C etc. I live for the experiences and I believe you can't judge people with experiencing at least a little of what they have. Weed is relaxing and enjoyable and I've had long philosophical talks with friends over nothing at all. Ecstacy, Cocaine, Vallium, MKAT, MDMA all that stuff is good if you want to go out have a great time without really knowing why it's a good time, these things bring you up and you feel as though your night is invincible (not as many of the adverts claim, that you are invincible, I've never had the urge to go fight someone whilst doing drugs or climb scaffolds or try to fly.) You just have a good time even if it's pouring down with rain, you've been charged £6 for a beer, you can't get a taxi and the prospect of work the next day is looming. The harder stuff's not really worth mentioning, I believe I'd have enjoyed them more if I needed to enjoy them more, if you understand my meaning. The best drug I've ever taen was LSD at T in the Park (A big festival in Scotland) and it was a wonderous affair. I didn't see any pink dragons or giants spiders or whatever else but reality was warped, I knew what was happening around me but my senses weren't sure. I remember for example putting my ticket into my boxers because I could feel the wind blowing away my clothes, my skin and everything else, I was walking around as a skeleton with a ticket lodged in my pelvis, but it felt amazing, I was weightless and worryless. The experience left me with synesthesia (which you can look up to understand more) but essentially I now see colours when I hear sounds.
I will say though that you shouldn't try hard drugs as a way to escape your problems, never get addicted and never rely on a pill or a plant to solve your problems. Try everything once but always be careful and don't let anything get a grip of you.