I seriously suggest you consider what style of gaming you prefer, then look at the available console options. The 360 and PS3 offer about the same as far as gaming experience at this time, with the 360 having the better game library and the PS3 with more to offer in the future (maybe), the Wii is best experienced with more than one person.
With that said, review the feature lists and compile a personal list of characteristics that really stand out to you. For example; GameCube enthusiasts, casual gamers, and social gamers are more adapt to enjoying the Wii - even if Nintendo is trying to expand it's library to meet everyone's expectations. Traditional gamers who preference to typical button mashing style with enhanced graphics are going to preference the Xbox 360. The PS3 gamers are currently a unique group as there system has taken on some motion control along with the traditional style gaming, and of course the enhanced graphics as well.
Personally I consider the Wii a better complimentary system even if you preference the traditional gaming method. Having a Wii present at parties, family reunions, and just about any social gathering will make it worth it's meager $250 dollar price tag, and it's impressively small size makes it easy to transport with the proper carrying case. Once the system is connected you will have an almost instant crowd pleaser, as those who've played to those who thought they'd never like it will come swarming. So even if you don't make it as your primary choice system it still is not a waste of money by far.
Most importantly I would not base your purchase solely on the concept of what someone else says, but to really evaluate the system before moving forward. Double check your budget, look what each system has to offer, then decide for yourself which console will probably best suit you.
Note: If you have the option in your local area, check to see if video rental locations are willing to rent the game consoles as well. Most require a deposit, a small rental fee, and then you take it home to try it for yourself. If that is not an option, call local game retailers (such as GameStop/EBgames and Wal-mart) and ask if they have demo units on the floor available for play. If they do, you could then get some idea of what system will best suit your gaming needs.