I accept most of the friend requests (except those who have a private profile or a vac/trade ban) but make sure you tell me the reason why you added me.
Also, don't break any of the following rules:

Rules
First talk before trade (Do NOT instant trade invite on me, I hate it).
Do NOT beg for stuff.
Do NOT invite me to groups.
Do NOT add me back if I rejected your invite or deleted you from my list.
Do NOT spam me with messages; (avoid writing one word on a single/each line).
Do NOT constantly invite me to games.
Don't try to scam me, you'll waste your time.

News
Do not add me to beg friends list items or games, will be deleted and blocked.
Friends that haven't logged on steam for more than 15 days will be removed.