I put 2.5 pounds of raspberries in my light ale. I tasted it when I put it into the secondary and the raspberry flavor is very bold and tart. If I do this again I would add some non fermentable sugar to sweeten it a bit. Maybe a raspberry cream ale.
I used frozen berries and they gave up more flavor than I expected.
This is the first batch of mine the wife has tasted and likes and it's not even in the bottles yet