I started on trumpet, switched to euph in college, and have just recently come back to the trumpet. I even picked up a cheapo Chinese valve trombone for a lark... It's actually a lot of fun. Finding time to practice ALL the various horns is a challenge. I'm currently giving the trumpet the Lion's share of my time, but can roll over to the euph after burning out my trumpet chops and get my embouchure a second wind. Trying to juggle too many horns might not be a great approach if I was hoping to achieve a pro level of competence, but there's joy in making music at several ends of the sonic spectrum, and I'm having a blast!