I've got the same phone and I use the copy and paste function frequently. For example, if someone sends me a text message asking me for someone's telephone number. Say that person doesn't have a smartphone, I don't want to send them my contact as a vcard because I don't know if their phone can accept it. So, I open up the contact, highlight the phone number and hit copy. Then I switch back to the sms function of the phone, hit paste and select send. It's simple and it takes all of maybe 30 seconds.
When my upgrade comes around, I might just switch to android even though I have really enjoyed my WinMo phone.
A mathematician is a device for turning coffee into theorems. -- P. Erdos