Shoot whatever appeals to you, longbows or recurves. It really doesn't matter, as long as you like it and it's a well made bow, of which there are many, many out there.
What you need to know about is form. The reason you shoot well on some days and not so well on other days is that some days you do something differently when you shoot than you do on other days. Maybe several things differently. If you're like me, you probably don't know what you're doing differently, so you guess. If you guess wrong, now you're doing another thing differently, which compounds the problem.
The best thing you, me or anybody could do for their shooting is to study Terry's clock, watch instructional DVD's, video yourself, and get some instruction in a class or from a good instructor.