Intimidation.
we are only 5 years into camping. our first was a small 16' we bought used, cheap. that was instantly to small.
our 2nd was a cherokee, i want to say 27bh. i was freaked out about it. let's face it, that's a big load behind you, in most cases way larger than the vehicle you tow with. it was the case for me, and besides, i hadn't towed much more than a boat, ever.
we now have a 35' tt, and i could care less about the size. to me, the longer it is the better it backs. it takes up more space taking corners, but hey.
anyhow, give it a shot, you'll get used to it. before you know it, you'll need more space too.
congrats on your new camper btw.