GoogletaLk vS msn messenger vs yahoo messenger

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which of these messenger is better? is it alright to discuss it here? im currently using msn messenger and googletalk.. and so far.. googletalk produce a better result and i really like to use it.. i can transfer file in short duration.. and it takes lesser time to reply a message :P ... woah.. it's really good.. but.. most of my friends using msn messenger.. and yahoo messenger.. so.. im not really sure which is the best...