Mera is high and wild, but not daunting. Make sure you acclimitize well, don't burn yourself out on the approach like some youths are apt to do, and you have a good chance at bagging a nice 6400 meter summit.
Oh, and get some solid basic mountaineering skills under your belt first, so you only have to deal with the altitude and not fumble around with your equipment and technique.
The trek in there is absolutely through suberb Himalayan scenery, and if you do the Hongu circuit it is totally wild country.
So, my $0.02 for Mera.