Back2back pregnancy plans

Anyone else currently pregnant and already planning for the next? I am a FTM and I'm already ready to have the next child(ren). I am an only child so I want to have up to 3 but if my next one is a girl I may stick with 2. Many older women tell me it's best to have them back-to-Back but some women closer to my age are saying "just wait and see after you have your first." My thought is if I plan to have them anyway I might as well do it now while I'm most fertile and have the most energy for pregnancy. I'm 25 now and due May 2016 and I want all 3 before I turn 30.