right now about 7k folk play at any one time. its second behind HL and all of its mods. but no single half life mod has as many folk in it as BF1942. so in reality BF1942 is the top FPS.
sniping is an art that involves patience, concealment, target detection, and creation of oppurtunity. snipers in real life very rarely shoot a moving target. snipers enforce the laws of darwinian selection on the battlefield. ur main targets are the stupid folks that inhabit the field of combat. the smart ones seldom if ever get shot by a sniper but they are not ur main effort anyway. the goal of the sniper is not to win battles or take points or capture territory. the sniper is a force multiplier. they work best as support and scout units reporting back what the enemy is doing and taking out harmful enemy personal like other snipers, engineers and soldiers that are dumb enough to stand still in a battlefield in the open. a good snipe will put himself in a position where he has cover or concealment from enemy observation while allowing a good view of the battlefield. doing the first two things patience and concealment will create oppurtunity and over time improve ur target detection skills. for a begining sniper dont shoot a moving target and practice on targets mving toward and away from u and work ur way up. with practice u will learn how much lead u need on a laterally moving target. its hard but not impossible. even harder still is the sniping of a target in a jeep or a gunner in a moving vehicle. when u can sipe a jeep driver moving at a 90 degree angle to ur positin u have achieved greatness. i have done it i know it can be done. u will probably get accused of using cheats and hacks. i take those accusations as compliments of the skill i have worked to get to that level.