Hi straightblast: When i trained Muay Thai before meeting my Sifu that was one of my favourite techniques! It's a very fast and powerful movement and really takes the persons balance.
Actually now i am training with my Sifu, i really wish i hadn't trained in anything before I've only been training around 18 months and am still trying to 'unlearn' everything i have done before, so i can use the wing chun principles clearly. I'm starting to get there, but i guess theres no rush...
I would say that mixing striking arts can be very troublesome. For me before, i did Karate, Boxing/MT and Shorinji Kempo, and actually didn't find much trouble swapping between the 2. But WC principles of punching are very different (to me anyway), so i have found some troubles there.
With grappling i'm not so sure. I did Aikido before also (for 5 years), and the footwork and principles are again very different. Actually i was mugged recently, and the Aikido training managed to protect me from harm which is great
Of course, no 2 people are the same, so you may have no problem. Just relaying my own thoughts and experiences...
My advice would be to stick with Wing Chun and see the richness that it has to offer. If you have any questions and problems, i'm sure the best thing to do is ask a Sihing or your Sifu
good luck with whatever you choose,
david
Peace is not the product of terror or fear.
Peace is not the silence of cemeteries.
Peace is not the silent result of violent repression.
Peace is the generous, tranquil contribution of all to the good of all.
Peace is dynamism. Peace is generosity.
It is right and it is duty.